| 
                 
                    Closing price on 5/18/2012
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    29.60 | 
                 
                
                    | High | 
                    30.00 | 
                 
                
                    | Low | 
                    28.50 | 
                     
                
                    | Volume | 
                    78,800 | 
                                 
                
                    | Split-adjusted Price | 
                    5.86 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
LAS Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                5/18/2012
             | 
            
                +0.20 / +0.67%
             |             
            
                29.60
             |           
            
                30.00
             |               
            
                28.50
             |                           
            
                30.00
             | 
            
                29.12
             |                     
            
                5.86
             |                                 
            
                78,800
             |            
            
                 
             |                                       
         
    
        
            | 
                5/17/2012
             | 
            
                -0.70 / -2.30%
             |             
            
                30.50
             |           
            
                31.00
             |               
            
                29.70
             |                           
            
                29.80
             | 
            
                30.05
             |                     
            
                5.82
             |                                 
            
                71,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/16/2012
             | 
            
                +1.20 / +4.10%
             |             
            
                29.00
             |           
            
                31.00
             |               
            
                28.50
             |                           
            
                30.50
             | 
            
                29.28
             |                     
            
                5.96
             |                                 
            
                161,300
             |            
            
                 
             |                                       
         
    
        
            | 
                5/15/2012
             | 
            
                -2.20 / -6.98%
             |             
            
                31.00
             |           
            
                32.50
             |               
            
                29.30
             |                           
            
                29.30
             | 
            
                29.91
             |                     
            
                5.72
             |                                 
            
                354,150
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/14/2012
             | 
            
                -2.10 / -6.25%
             |             
            
                33.80
             |           
            
                34.00
             |               
            
                31.50
             |                           
            
                31.50
             | 
            
                32.03
             |                     
            
                6.15
             |                                 
            
                201,200
             |            
            
                 
             |                                       
         
    
        
            | 
                5/11/2012
             | 
            
                -1.50 / -4.27%
             |             
            
                35.30
             |           
            
                35.30
             |               
            
                33.00
             |                           
            
                33.60
             | 
            
                34.17
             |                     
            
                6.56
             |                                 
            
                113,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/10/2012
             | 
            
                -1.90 / -5.14%
             |             
            
                37.30
             |           
            
                37.50
             |               
            
                35.00
             |                           
            
                35.10
             | 
            
                35.91
             |                     
            
                6.86
             |                                 
            
                202,400
             |            
            
                 
             |                                       
         
    
        
            | 
                5/9/2012
             | 
            
                +0.60 / +1.65%
             |             
            
                38.90
             |           
            
                38.90
             |               
            
                36.40
             |                           
            
                37.00
             | 
            
                37.64
             |                     
            
                7.23
             |                                 
            
                129,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/8/2012
             | 
            
                +2.30 / +6.74%
             |             
            
                36.40
             |           
            
                36.40
             |               
            
                36.40
             |                           
            
                36.40
             | 
            
                36.40
             |                     
            
                7.11
             |                                 
            
                620,800
             |            
            
                 
             |                                       
         
    
        
            | 
                5/7/2012
             | 
            
                +2.30 / +7.23%
             |             
            
                33.20
             |           
            
                34.10
             |               
            
                33.20
             |                           
            
                34.10
             | 
            
                34.07
             |                     
            
                6.66
             |                                 
            
                343,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/4/2012
             | 
            
                -0.90 / -2.75%
             |             
            
                32.20
             |           
            
                32.50
             |               
            
                31.80
             |                           
            
                31.80
             | 
            
                32.02
             |                     
            
                6.21
             |                                 
            
                126,300
             |            
            
                 
             |                                       
         
    
        
            | 
                5/3/2012
             | 
            
                +0.60 / +1.87%
             |             
            
                33.80
             |           
            
                33.90
             |               
            
                30.60
             |                           
            
                32.70
             | 
            
                32.01
             |                     
            
                6.39
             |                                 
            
                51,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/2/2012
             | 
            
                +2.20 / +7.36%
             |             
            
                31.50
             |           
            
                32.10
             |               
            
                31.00
             |                           
            
                32.10
             | 
            
                32.01
             |                     
            
                6.27
             |                                 
            
                220,982
             |            
            
                 
             |                                       
         
    
        
            | 
                4/27/2012
             | 
            
                +1.10 / +3.82%
             |             
            
                29.00
             |           
            
                30.20
             |               
            
                28.80
             |                           
            
                29.90
             | 
            
                29.44
             |                     
            
                5.84
             |                                 
            
                151,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/26/2012
             | 
            
                -0.10 / -0.35%
             |             
            
                29.30
             |           
            
                29.50
             |               
            
                28.80
             |                           
            
                28.80
             | 
            
                29.02
             |                     
            
                5.63
             |                                 
            
                72,200
             |            
            
                 
             |                                       
         
    
        
            | 
                4/25/2012
             | 
            
                +0.60 / +2.12%
             |             
            
                29.20
             |           
            
                29.50
             |               
            
                28.50
             |                           
            
                28.90
             | 
            
                29.12
             |                     
            
                5.65
             |                                 
            
                101,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/24/2012
             | 
            
                +0.20 / +0.71%
             |             
            
                27.70
             |           
            
                28.30
             |               
            
                27.70
             |                           
            
                28.30
             | 
            
                28.10
             |                     
            
                5.53
             |                                 
            
                24,300
             |            
            
                 
             |                                       
         
    
        
            | 
                4/23/2012
             | 
            
                +0.10 / +0.36%
             |             
            
                28.00
             |           
            
                28.10
             |               
            
                27.70
             |                           
            
                28.10
             | 
            
                27.99
             |                     
            
                5.49
             |                                 
            
                58,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/20/2012
             | 
            
                +0.30 / +1.08%
             |             
            
                27.30
             |           
            
                28.00
             |               
            
                27.30
             |                           
            
                28.00
             | 
            
                27.65
             |                     
            
                5.47
             |                                 
            
                50,200
             |            
            
                 
             |                                       
         
    
        
            | 
                4/19/2012
             | 
            
                -0.60 / -2.12%
             |             
            
                28.30
             |           
            
                28.50
             |               
            
                27.70
             |                           
            
                27.70
             | 
            
                28.12
             |                     
            
                5.41
             |                                 
            
                106,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/18/2012
             | 
            
                -0.50 / -1.74%
             |             
            
                28.90
             |           
            
                29.30
             |               
            
                28.30
             |                           
            
                28.30
             | 
            
                28.74
             |                     
            
                5.53
             |                                 
            
                71,400
             |            
            
                 
             |                                       
         
    
        
            | 
                4/17/2012
             | 
            
                +1.70 / +6.27%
             |             
            
                28.00
             |           
            
                28.90
             |               
            
                27.30
             |                           
            
                28.80
             | 
            
                28.49
             |                     
            
                5.63
             |                                 
            
                340,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/16/2012
             | 
            
                +1.20 / +4.63%
             |             
            
                26.30
             |           
            
                27.20
             |               
            
                26.10
             |                           
            
                27.10
             | 
            
                26.78
             |                     
            
                5.29
             |                                 
            
                183,800
             |            
            
                 
             |                                       
         
    
        
            | 
                4/13/2012
             | 
            
                -0.30 / -1.15%
             |             
            
                26.90
             |           
            
                26.90
             |               
            
                25.60
             |                           
            
                25.90
             | 
            
                25.95
             |                     
            
                5.06
             |                                 
            
                116,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/12/2012
             | 
            
                +0.20 / +0.77%
             |             
            
                26.10
             |           
            
                26.80
             |               
            
                26.00
             |                           
            
                26.20
             | 
            
                26.26
             |                     
            
                5.12
             |                                 
            
                164,800
             |            
            
                 
             |                                       
         
    
        
            | 
                4/11/2012
             | 
            
                0.00 / 0.00%
             |             
            
                25.80
             |           
            
                26.00
             |               
            
                25.20
             |                           
            
                26.00
             | 
            
                25.79
             |                     
            
                5.08
             |                                 
            
                65,350
             |  
            
                 
             |                                                              
             
    
        			
            | 
                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
             |  
            
                 
             |                                                              
             
    
         
    
    
 |