| 
                 
                    Closing price on 9/9/2011
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    14.20 | 
                 
                
                    | High | 
                    14.30 | 
                 
                
                    | Low | 
                    13.50 | 
                     
                
                    | Volume | 
                    6,500 | 
                                 
                
                    | Split-adjusted Price | 
                    9.87 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
XMC Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                9/9/2011
             | 
            
                +0.20 / +1.50%
             |             
            
                14.20
             |           
            
                14.30
             |               
            
                13.50
             |                           
            
                13.50
             | 
            
                13.70
             |                     
            
                9.87
             |                                 
            
                6,500
             |            
            
                 
             |                                       
         
    
        
            | 
                9/8/2011
             | 
            
                -0.40 / -2.92%
             |             
            
                12.90
             |           
            
                13.90
             |               
            
                12.80
             |                           
            
                13.30
             | 
            
                13.61
             |                     
            
                9.72
             |                                 
            
                4,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/7/2011
             | 
            
                +0.90 / +7.03%
             |             
            
                13.00
             |           
            
                13.70
             |               
            
                13.00
             |                           
            
                13.70
             | 
            
                13.12
             |                     
            
                10.02
             |                                 
            
                1,700
             |            
            
                 
             |                                       
         
    
        
            | 
                9/6/2011
             | 
            
                -0.70 / -5.19%
             |             
            
                13.90
             |           
            
                13.90
             |               
            
                12.80
             |                           
            
                12.80
             | 
            
                13.15
             |                     
            
                9.36
             |                                 
            
                1,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/5/2011
             | 
            
                0.00 / 0.00%
             |             
            
                13.40
             |           
            
                13.60
             |               
            
                13.40
             |                           
            
                13.50
             | 
            
                13.51
             |                     
            
                9.87
             |                                 
            
                3,000
             |            
            
                 
             |                                       
         
    
        
            | 
                9/1/2011
             | 
            
                -0.30 / -2.11%
             |             
            
                13.70
             |           
            
                14.40
             |               
            
                13.70
             |                           
            
                13.90
             | 
            
                14.22
             |                     
            
                10.16
             |                                 
            
                8,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/31/2011
             | 
            
                +0.70 / +5.19%
             |             
            
                13.00
             |           
            
                14.20
             |               
            
                13.00
             |                           
            
                14.20
             | 
            
                13.67
             |                     
            
                10.38
             |                                 
            
                2,100
             |            
            
                 
             |                                       
         
    
        
            | 
                8/30/2011
             | 
            
                +0.20 / +1.50%
             |             
            
                13.50
             |           
            
                13.60
             |               
            
                13.50
             |                           
            
                13.50
             | 
            
                13.57
             |                     
            
                9.87
             |                                 
            
                20,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/29/2011
             | 
            
                0.00 / 0.00%
             |             
            
                12.60
             |           
            
                13.30
             |               
            
                12.60
             |                           
            
                13.30
             | 
            
                12.81
             |                     
            
                9.72
             |                                 
            
                14,200
             |            
            
                 
             |                                       
         
    
        
            | 
                8/26/2011
             | 
            
                +0.20 / +1.60%
             |             
            
                12.50
             |           
            
                12.70
             |               
            
                12.50
             |                           
            
                12.70
             | 
            
                12.58
             |                     
            
                9.29
             |                                 
            
                1,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/25/2011
             | 
            
                -0.30 / -2.34%
             |             
            
                12.60
             |           
            
                12.60
             |               
            
                12.50
             |                           
            
                12.50
             | 
            
                12.50
             |                     
            
                9.14
             |                                 
            
                2,800
             |            
            
                 
             |                                       
         
    
        
            | 
                8/24/2011
             | 
            
                -0.20 / -1.54%
             |             
            
                13.00
             |           
            
                13.00
             |               
            
                12.80
             |                           
            
                12.80
             | 
            
                12.85
             |                     
            
                9.36
             |                                 
            
                5,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/23/2011
             | 
            
                +0.10 / +0.78%
             |             
            
                12.70
             |           
            
                13.00
             |               
            
                12.70
             |                           
            
                13.00
             | 
            
                12.91
             |                     
            
                9.50
             |                                 
            
                9,900
             |            
            
                 
             |                                       
         
    
        
            | 
                8/22/2011
             | 
            
                0.00 / 0.00%
             |             
            
                12.10
             |           
            
                13.40
             |               
            
                12.10
             |                           
            
                12.90
             | 
            
                12.42
             |                     
            
                9.43
             |                                 
            
                25,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/19/2011
             | 
            
                -0.40 / -3.08%
             |             
            
                12.60
             |           
            
                12.60
             |               
            
                12.60
             |                           
            
                12.60
             | 
            
                12.60
             |                     
            
                9.21
             |                                 
            
                100
             |            
            
                 
             |                                       
         
    
        
            | 
                8/18/2011
             | 
            
                -0.70 / -5.11%
             |             
            
                13.10
             |           
            
                13.10
             |               
            
                13.00
             |                           
            
                13.00
             | 
            
                13.07
             |                     
            
                9.50
             |                                 
            
                300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/17/2011
             | 
            
                +0.20 / +1.48%
             |             
            
                13.70
             |           
            
                13.70
             |               
            
                13.70
             |                           
            
                13.70
             | 
            
                13.70
             |                     
            
                10.02
             |                                 
            
                200
             |            
            
                 
             |                                       
         
    
        
            | 
                8/16/2011
             | 
            
                0.00 / 0.00%
             |             
            
                13.50
             |           
            
                13.50
             |               
            
                13.50
             |                           
            
                13.50
             | 
            
                13.50
             |                     
            
                9.87
             |                                 
            
                0
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/15/2011
             | 
            
                0.00 / 0.00%
             |             
            
                13.50
             |           
            
                13.50
             |               
            
                13.50
             |                           
            
                13.50
             | 
            
                13.50
             |                     
            
                9.87
             |                                 
            
                100
             |            
            
                 
             |                                       
         
    
        
            | 
                8/12/2011
             | 
            
                +0.40 / +3.10%
             |             
            
                12.00
             |           
            
                13.30
             |               
            
                12.00
             |                           
            
                13.30
             | 
            
                12.76
             |                     
            
                9.72
             |                                 
            
                500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/11/2011
             | 
            
                0.00 / 0.00%
             |             
            
                12.90
             |           
            
                12.90
             |               
            
                12.90
             |                           
            
                12.90
             | 
            
                12.90
             |                     
            
                9.43
             |                                 
            
                600
             |            
            
                 
             |                                       
         
    
        
            | 
                8/10/2011
             | 
            
                +0.40 / +3.20%
             |             
            
                12.90
             |           
            
                12.90
             |               
            
                12.90
             |                           
            
                12.90
             | 
            
                12.90
             |                     
            
                9.43
             |                                 
            
                100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/9/2011
             | 
            
                -0.70 / -5.30%
             |             
            
                12.50
             |           
            
                12.50
             |               
            
                12.50
             |                           
            
                12.50
             | 
            
                12.50
             |                     
            
                9.14
             |                                 
            
                1,000
             |            
            
                 
             |                                       
         
    
        
            | 
                8/8/2011
             | 
            
                0.00 / 0.00%
             |             
            
                13.20
             |           
            
                13.20
             |               
            
                13.20
             |                           
            
                13.20
             | 
            
                13.20
             |                     
            
                9.65
             |                                 
            
                0
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/5/2011
             | 
            
                -0.20 / -1.49%
             |             
            
                13.20
             |           
            
                13.20
             |               
            
                13.20
             |                           
            
                13.20
             | 
            
                13.20
             |                     
            
                9.65
             |                                 
            
                300
             |            
            
                 
             |                                       
         
    
        
            | 
                8/4/2011
             | 
            
                +0.80 / +6.35%
             |             
            
                13.40
             |           
            
                13.40
             |               
            
                13.40
             |                           
            
                13.40
             | 
            
                13.40
             |                     
            
                9.80
             |                                 
            
                100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/3/2011
             | 
            
                -0.80 / -5.97%
             |             
            
                13.30
             |           
            
                13.30
             |               
            
                12.60
             |                           
            
                12.60
             | 
            
                12.64
             |                     
            
                9.21
             |                                 
            
                9,300
             |            
            
                 
             |                                       
         
    
        
            | 
                8/2/2011
             | 
            
                -0.60 / -4.29%
             |             
            
                13.50
             |           
            
                13.50
             |               
            
                13.40
             |                           
            
                13.40
             | 
            
                13.44
             |                     
            
                9.80
             |                                 
            
                700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/1/2011
             | 
            
                0.00 / 0.00%
             |             
            
                14.00
             |           
            
                14.00
             |               
            
                14.00
             |                           
            
                14.00
             | 
            
                14.00
             |                     
            
                10.24
             |                                 
            
                0
             |            
            
                 
             |                                       
         
    
        
            | 
                7/29/2011
             | 
            
                +0.70 / +5.19%
             |             
            
                13.40
             |           
            
                14.20
             |               
            
                13.40
             |                           
            
                14.20
             | 
            
                14.04
             |                     
            
                10.38
             |                                 
            
                500
             |  
            
                 
             |                                                              
             
    
         
    
    
 |