| 
                 
                    Closing price on 9/20/2010
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    43.00 | 
                 
                
                    | High | 
                    43.00 | 
                 
                
                    | Low | 
                    40.60 | 
                     
                
                    | Volume | 
                    37,800 | 
                                 
                
                    | Split-adjusted Price | 
                    30.12 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
XMC Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                9/20/2010
             | 
            
                0.00 / 0.00%
             |             
            
                43.00
             |           
            
                43.00
             |               
            
                40.60
             |                           
            
                41.20
             | 
            
                41.43
             |                     
            
                30.12
             |                                 
            
                37,800
             |            
            
                 
             |                                       
         
    
        
            | 
                9/17/2010
             | 
            
                +1.50 / +3.78%
             |             
            
                41.50
             |           
            
                42.30
             |               
            
                40.10
             |                           
            
                41.20
             | 
            
                41.49
             |                     
            
                30.12
             |                                 
            
                62,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/16/2010
             | 
            
                +0.10 / +0.25%
             |             
            
                39.60
             |           
            
                40.00
             |               
            
                39.20
             |                           
            
                39.70
             | 
            
                39.78
             |                     
            
                29.03
             |                                 
            
                35,100
             |            
            
                 
             |                                       
         
    
        
            | 
                9/15/2010
             | 
            
                +0.10 / +0.25%
             |             
            
                39.00
             |           
            
                40.30
             |               
            
                39.00
             |                           
            
                39.60
             | 
            
                39.63
             |                     
            
                28.95
             |                                 
            
                45,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/14/2010
             | 
            
                +0.10 / +0.25%
             |             
            
                39.40
             |           
            
                41.70
             |               
            
                39.40
             |                           
            
                39.50
             | 
            
                40.36
             |                     
            
                28.88
             |                                 
            
                60,400
             |            
            
                 
             |                                       
         
    
        
            | 
                9/13/2010
             | 
            
                0.00 / 0.00%
             |             
            
                39.00
             |           
            
                39.60
             |               
            
                38.70
             |                           
            
                39.40
             | 
            
                39.00
             |                     
            
                28.81
             |                                 
            
                79,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/10/2010
             | 
            
                -1.60 / -3.85%
             |             
            
                43.00
             |           
            
                43.00
             |               
            
                39.00
             |                           
            
                40.00
             | 
            
                40.46
             |                     
            
                29.25
             |                                 
            
                71,900
             |            
            
                 
             |                                       
         
    
        
            | 
                9/9/2010
             | 
            
                +1.40 / +3.48%
             |             
            
                41.90
             |           
            
                42.00
             |               
            
                41.00
             |                           
            
                41.60
             | 
            
                41.61
             |                     
            
                30.42
             |                                 
            
                52,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/8/2010
             | 
            
                -1.00 / -2.43%
             |             
            
                40.40
             |           
            
                40.80
             |               
            
                39.20
             |                           
            
                40.20
             | 
            
                40.08
             |                     
            
                29.39
             |                                 
            
                96,000
             |            
            
                 
             |                                       
         
    
        
            | 
                9/7/2010
             | 
            
                -1.60 / -3.74%
             |             
            
                42.00
             |           
            
                42.50
             |               
            
                41.20
             |                           
            
                41.20
             | 
            
                41.60
             |                     
            
                30.12
             |                                 
            
                89,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/6/2010
             | 
            
                0.00 / 0.00%
             |             
            
                42.20
             |           
            
                44.00
             |               
            
                42.20
             |                           
            
                42.80
             | 
            
                43.24
             |                     
            
                31.29
             |                                 
            
                88,600
             |            
            
                 
             |                                       
         
    
        
            | 
                9/1/2010
             | 
            
                +0.30 / +0.72%
             |             
            
                42.00
             |           
            
                42.30
             |               
            
                40.50
             |                           
            
                41.70
             | 
            
                41.61
             |                     
            
                30.49
             |                                 
            
                58,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/31/2010
             | 
            
                +0.80 / +1.97%
             |             
            
                40.50
             |           
            
                43.00
             |               
            
                39.50
             |                           
            
                41.40
             | 
            
                41.46
             |                     
            
                30.27
             |                                 
            
                70,600
             |            
            
                 
             |                                       
         
    
        
            | 
                8/30/2010
             | 
            
                0.00 / 0.00%
             |             
            
                40.00
             |           
            
                40.60
             |               
            
                40.00
             |                           
            
                40.60
             | 
            
                40.53
             |                     
            
                29.68
             |                                 
            
                117,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/27/2010
             | 
            
                +0.10 / +0.26%
             |             
            
                38.60
             |           
            
                38.60
             |               
            
                37.00
             |                           
            
                38.30
             | 
            
                37.99
             |                     
            
                28.00
             |                                 
            
                49,300
             |            
            
                 
             |                                       
         
    
        
            | 
                8/26/2010
             | 
            
                +0.20 / +0.53%
             |             
            
                38.00
             |           
            
                40.00
             |               
            
                38.00
             |                           
            
                38.20
             | 
            
                38.63
             |                     
            
                27.93
             |                                 
            
                70,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/25/2010
             | 
            
                -0.70 / -1.81%
             |             
            
                41.30
             |           
            
                41.30
             |               
            
                37.40
             |                           
            
                38.00
             | 
            
                38.16
             |                     
            
                27.78
             |                                 
            
                100,300
             |            
            
                 
             |                                       
         
    
        
            | 
                8/24/2010
             | 
            
                -2.00 / -4.91%
             |             
            
                40.00
             |           
            
                40.00
             |               
            
                38.40
             |                           
            
                38.70
             | 
            
                38.58
             |                     
            
                28.29
             |                                 
            
                42,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/23/2010
             | 
            
                0.00 / 0.00%
             |             
            
                42.60
             |           
            
                42.60
             |               
            
                40.50
             |                           
            
                40.70
             | 
            
                40.91
             |                     
            
                29.76
             |                                 
            
                6,100
             |            
            
                 
             |                                       
         
    
        
            | 
                8/20/2010
             | 
            
                -0.60 / -1.44%
             |             
            
                41.00
             |           
            
                41.90
             |               
            
                40.30
             |                           
            
                41.10
             | 
            
                40.91
             |                     
            
                30.05
             |                                 
            
                35,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/19/2010
             | 
            
                +0.90 / +2.21%
             |             
            
                41.50
             |           
            
                41.70
             |               
            
                40.20
             |                           
            
                41.70
             | 
            
                41.51
             |                     
            
                30.49
             |                                 
            
                26,600
             |            
            
                 
             |                                       
         
    
        
            | 
                8/18/2010
             | 
            
                -1.40 / -3.32%
             |             
            
                42.70
             |           
            
                42.70
             |               
            
                40.70
             |                           
            
                40.80
             | 
            
                40.96
             |                     
            
                29.83
             |                                 
            
                23,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/17/2010
             | 
            
                -1.80 / -4.09%
             |             
            
                44.00
             |           
            
                44.00
             |               
            
                42.00
             |                           
            
                42.20
             | 
            
                42.65
             |                     
            
                30.85
             |                                 
            
                14,300
             |            
            
                 
             |                                       
         
    
        
            | 
                8/16/2010
             | 
            
                0.00 / 0.00%
             |             
            
                44.00
             |           
            
                44.50
             |               
            
                43.00
             |                           
            
                44.00
             | 
            
                44.03
             |                     
            
                32.17
             |                                 
            
                24,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/13/2010
             | 
            
                +1.10 / +2.68%
             |             
            
                42.00
             |           
            
                42.10
             |               
            
                40.80
             |                           
            
                42.10
             | 
            
                41.75
             |                     
            
                30.78
             |                                 
            
                85,200
             |            
            
                 
             |                                       
         
    
        
            | 
                8/12/2010
             | 
            
                -0.80 / -1.91%
             |             
            
                41.00
             |           
            
                41.00
             |               
            
                39.00
             |                           
            
                41.00
             | 
            
                39.42
             |                     
            
                29.98
             |                                 
            
                112,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/11/2010
             | 
            
                -0.10 / -0.24%
             |             
            
                42.80
             |           
            
                42.80
             |               
            
                41.00
             |                           
            
                41.80
             | 
            
                41.53
             |                     
            
                30.56
             |                                 
            
                60,500
             |            
            
                 
             |                                       
         
    
        
            | 
                8/10/2010
             | 
            
                +0.30 / +0.72%
             |             
            
                41.50
             |           
            
                41.90
             |               
            
                39.20
             |                           
            
                41.90
             | 
            
                40.78
             |                     
            
                30.63
             |                                 
            
                87,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/9/2010
             | 
            
                0.00 / 0.00%
             |             
            
                44.00
             |           
            
                44.00
             |               
            
                41.60
             |                           
            
                41.60
             | 
            
                41.86
             |                     
            
                30.42
             |                                 
            
                84,900
             |            
            
                 
             |                                       
         
    
        
            | 
                8/6/2010
             | 
            
                0.00 / 0.00%
             |             
            
                44.00
             |           
            
                45.10
             |               
            
                44.00
             |                           
            
                45.00
             | 
            
                44.63
             |                     
            
                32.90
             |                                 
            
                26,400
             |  
            
                 
             |                                                              
             
    
         
    
    
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