| 
                 
                    Closing price on 4/10/2012
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    25.50 | 
                 
                
                    | High | 
                    26.50 | 
                 
                
                    | Low | 
                    25.00 | 
                     
                
                    | Volume | 
                    98,600 | 
                                 
                
                    | Split-adjusted Price | 
                    5.08 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
LAS Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                4/10/2012
             | 
            
                +0.50 / +1.96%
             |             
            
                25.50
             |           
            
                26.50
             |               
            
                25.00
             |                           
            
                26.00
             | 
            
                25.79
             |                     
            
                5.08
             |                                 
            
                98,600
             |            
            
                 
             |                                       
         
    
        
            | 
                4/9/2012
             | 
            
                +1.50 / +6.25%
             |             
            
                24.00
             |           
            
                25.50
             |               
            
                23.90
             |                           
            
                25.50
             | 
            
                25.30
             |                     
            
                4.98
             |                                 
            
                264,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/6/2012
             | 
            
                0.00 / 0.00%
             |             
            
                24.40
             |           
            
                24.40
             |               
            
                23.50
             |                           
            
                24.00
             | 
            
                23.73
             |                     
            
                4.69
             |                                 
            
                102,800
             |            
            
                 
             |                                       
         
    
        
            | 
                4/5/2012
             | 
            
                +0.60 / +2.56%
             |             
            
                23.50
             |           
            
                25.00
             |               
            
                23.50
             |                           
            
                24.00
             | 
            
                24.20
             |                     
            
                4.69
             |                                 
            
                56,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/4/2012
             | 
            
                -0.20 / -0.85%
             |             
            
                23.50
             |           
            
                23.90
             |               
            
                23.40
             |                           
            
                23.40
             | 
            
                23.59
             |                     
            
                4.57
             |                                 
            
                59,900
             |            
            
                 
             |                                       
         
    
        
            | 
                4/3/2012
             | 
            
                +0.10 / +0.43%
             |             
            
                23.20
             |           
            
                23.80
             |               
            
                23.20
             |                           
            
                23.60
             | 
            
                23.53
             |                     
            
                4.61
             |                                 
            
                36,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/30/2012
             | 
            
                +0.10 / +0.43%
             |             
            
                23.40
             |           
            
                23.70
             |               
            
                23.40
             |                           
            
                23.50
             | 
            
                23.49
             |                     
            
                4.59
             |                                 
            
                49,000
             |            
            
                 
             |                                       
         
    
        
            | 
                3/29/2012
             | 
            
                -0.50 / -2.09%
             |             
            
                24.20
             |           
            
                24.20
             |               
            
                23.40
             |                           
            
                23.40
             | 
            
                23.58
             |                     
            
                4.57
             |                                 
            
                117,550
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/28/2012
             | 
            
                +0.50 / +2.14%
             |             
            
                23.00
             |           
            
                24.20
             |               
            
                23.00
             |                           
            
                23.90
             | 
            
                23.71
             |                     
            
                4.67
             |                                 
            
                29,700
             |            
            
                 
             |                                       
         
    
        
            | 
                3/27/2012
             | 
            
                +0.30 / +1.30%
             |             
            
                23.00
             |           
            
                24.70
             |               
            
                22.70
             |                           
            
                23.40
             | 
            
                23.72
             |                     
            
                4.57
             |                                 
            
                103,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/26/2012
             | 
            
                -1.20 / -4.94%
             |             
            
                24.00
             |           
            
                24.10
             |               
            
                23.10
             |                           
            
                23.10
             | 
            
                23.33
             |                     
            
                4.51
             |                                 
            
                165,400
             |            
            
                 
             |                                       
         
    
        
            | 
                3/23/2012
             | 
            
                -0.60 / -2.41%
             |             
            
                24.70
             |           
            
                25.40
             |               
            
                24.10
             |                           
            
                24.30
             | 
            
                24.44
             |                     
            
                4.75
             |                                 
            
                109,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/22/2012
             | 
            
                -1.70 / -6.39%
             |             
            
                27.50
             |           
            
                27.50
             |               
            
                24.80
             |                           
            
                24.90
             | 
            
                25.91
             |                     
            
                4.86
             |                                 
            
                90,300
             |            
            
                 
             |                                       
         
    
        
            | 
                3/21/2012
             | 
            
                +1.60 / +6.40%
             |             
            
                26.60
             |           
            
                26.60
             |               
            
                26.30
             |                           
            
                26.60
             | 
            
                26.58
             |                     
            
                5.20
             |                                 
            
                223,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/20/2012
             | 
            
                +1.50 / +6.38%
             |             
            
                24.80
             |           
            
                25.00
             |               
            
                24.60
             |                           
            
                25.00
             | 
            
                24.90
             |                     
            
                4.88
             |                                 
            
                587,300
             |            
            
                 
             |                                       
         
    
        
            | 
                3/19/2012
             | 
            
                +1.40 / +6.33%
             |             
            
                22.30
             |           
            
                23.50
             |               
            
                22.30
             |                           
            
                23.50
             | 
            
                23.42
             |                     
            
                4.59
             |                                 
            
                206,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/16/2012
             | 
            
                +1.40 / +6.76%
             |             
            
                20.70
             |           
            
                22.10
             |               
            
                20.70
             |                           
            
                22.10
             | 
            
                22.01
             |                     
            
                4.32
             |                                 
            
                163,100
             |            
            
                 
             |                                       
         
    
        
            | 
                3/15/2012
             | 
            
                +0.10 / +0.49%
             |             
            
                20.00
             |           
            
                21.00
             |               
            
                20.00
             |                           
            
                20.70
             | 
            
                20.68
             |                     
            
                4.04
             |                                 
            
                28,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/14/2012
             | 
            
                +0.30 / +1.48%
             |             
            
                20.10
             |           
            
                20.60
             |               
            
                20.00
             |                           
            
                20.60
             | 
            
                20.31
             |                     
            
                4.02
             |                                 
            
                76,700
             |            
            
                 
             |                                       
         
    
        
            | 
                3/13/2012
             | 
            
                -0.10 / -0.49%
             |             
            
                20.20
             |           
            
                20.60
             |               
            
                20.20
             |                           
            
                20.30
             | 
            
                20.36
             |                     
            
                3.97
             |                                 
            
                93,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/12/2012
             | 
            
                +0.60 / +3.03%
             |             
            
                20.00
             |           
            
                21.00
             |               
            
                20.00
             |                           
            
                20.40
             | 
            
                20.22
             |                     
            
                3.99
             |                                 
            
                136,000
             |            
            
                 
             |                                       
         
    
        
            | 
                3/9/2012
             | 
            
                +0.30 / +1.54%
             |             
            
                19.40
             |           
            
                20.20
             |               
            
                19.40
             |                           
            
                19.80
             | 
            
                19.94
             |                     
            
                3.87
             |                                 
            
                207,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/8/2012
             | 
            
                -0.70 / -3.47%
             |             
            
                19.30
             |           
            
                19.50
             |               
            
                19.00
             |                           
            
                19.50
             | 
            
                19.37
             |                     
            
                3.81
             |                                 
            
                42,800
             |            
            
                 
             |                                       
         
    
        
            | 
                3/7/2012
             | 
            
                -1.30 / -6.05%
             |             
            
                20.50
             |           
            
                20.50
             |               
            
                20.10
             |                           
            
                20.20
             | 
            
                20.28
             |                     
            
                3.95
             |                                 
            
                36,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/6/2012
             | 
            
                -1.00 / -4.44%
             |             
            
                23.00
             |           
            
                23.00
             |               
            
                21.40
             |                           
            
                21.50
             | 
            
                21.62
             |                     
            
                4.20
             |                                 
            
                20,400
             |            
            
                 
             |                                       
         
    
        
            | 
                3/5/2012
             | 
            
                +0.50 / +2.27%
             |             
            
                21.00
             |           
            
                23.00
             |               
            
                20.90
             |                           
            
                22.50
             | 
            
                21.89
             |                     
            
                4.40
             |                                 
            
                86,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/2/2012
             | 
            
                -0.10 / -0.45%
             |             
            
                23.50
             |           
            
                23.50
             |               
            
                22.00
             |                           
            
                22.00
             | 
            
                22.39
             |                     
            
                4.30
             |                                 
            
                25,700
             |            
            
                 
             |                                       
         
    
        
            | 
                3/1/2012
             | 
            
                +22.10 / +0.00%
             |             
            
                18.20
             |           
            
                22.10
             |               
            
                18.20
             |                           
            
                22.10
             | 
            
                21.99
             |                     
            
                4.32
             |                                 
            
                70,100
             |  
            
                 
             |                                                              
             
    
         
    
    
 |