| 
                 
                    Closing price on 6/10/2015
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    8.40 | 
                 
                
                    | High | 
                    8.50 | 
                 
                
                    | Low | 
                    7.80 | 
                     
                
                    | Volume | 
                    292,000 | 
                                 
                
                    | Split-adjusted Price | 
                    8.40 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
WSS Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                6/10/2015
             | 
            
                0.00 / 0.00%
             |             
            
                8.40
             |           
            
                8.50
             |               
            
                7.80
             |                           
            
                8.40
             | 
            
                8.21
             |                     
            
                8.40
             |                                 
            
                292,000
             |            
            
                 
             |                                       
         
    
        
            | 
                6/9/2015
             | 
            
                -0.20 / -2.33%
             |             
            
                8.70
             |           
            
                8.80
             |               
            
                8.40
             |                           
            
                8.40
             | 
            
                8.65
             |                     
            
                8.40
             |                                 
            
                379,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/8/2015
             | 
            
                -0.50 / -5.49%
             |             
            
                9.00
             |           
            
                9.10
             |               
            
                8.60
             |                           
            
                8.60
             | 
            
                8.88
             |                     
            
                8.60
             |                                 
            
                346,900
             |            
            
                 
             |                                       
         
    
        
            | 
                6/5/2015
             | 
            
                +0.20 / +2.25%
             |             
            
                8.90
             |           
            
                9.20
             |               
            
                8.60
             |                           
            
                9.10
             | 
            
                9.04
             |                     
            
                9.10
             |                                 
            
                543,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/4/2015
             | 
            
                +0.50 / +5.95%
             |             
            
                8.40
             |           
            
                9.00
             |               
            
                8.40
             |                           
            
                8.90
             | 
            
                8.77
             |                     
            
                8.90
             |                                 
            
                663,200
             |            
            
                 
             |                                       
         
    
        
            | 
                6/3/2015
             | 
            
                +0.70 / +9.09%
             |             
            
                7.70
             |           
            
                8.40
             |               
            
                7.60
             |                           
            
                8.40
             | 
            
                8.16
             |                     
            
                8.40
             |                                 
            
                990,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/2/2015
             | 
            
                +0.20 / +2.67%
             |             
            
                7.50
             |           
            
                7.80
             |               
            
                7.40
             |                           
            
                7.70
             | 
            
                7.50
             |                     
            
                7.70
             |                                 
            
                338,700
             |            
            
                 
             |                                       
         
    
        
            | 
                6/1/2015
             | 
            
                +0.20 / +2.74%
             |             
            
                7.30
             |           
            
                7.60
             |               
            
                7.30
             |                           
            
                7.50
             | 
            
                7.49
             |                     
            
                7.50
             |                                 
            
                250,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/29/2015
             | 
            
                +0.40 / +5.80%
             |             
            
                6.80
             |           
            
                7.50
             |               
            
                6.70
             |                           
            
                7.30
             | 
            
                7.11
             |                     
            
                7.30
             |                                 
            
                574,800
             |            
            
                 
             |                                       
         
    
        
            | 
                5/28/2015
             | 
            
                0.00 / 0.00%
             |             
            
                6.90
             |           
            
                7.00
             |               
            
                6.80
             |                           
            
                6.90
             | 
            
                6.89
             |                     
            
                6.90
             |                                 
            
                206,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/27/2015
             | 
            
                0.00 / 0.00%
             |             
            
                6.80
             |           
            
                6.90
             |               
            
                6.70
             |                           
            
                6.90
             | 
            
                6.80
             |                     
            
                6.90
             |                                 
            
                31,600
             |            
            
                 
             |                                       
         
    
        
            | 
                5/26/2015
             | 
            
                -0.10 / -1.43%
             |             
            
                7.00
             |           
            
                7.00
             |               
            
                6.80
             |                           
            
                6.90
             | 
            
                6.88
             |                     
            
                6.90
             |                                 
            
                223,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/25/2015
             | 
            
                +0.10 / +1.45%
             |             
            
                6.90
             |           
            
                7.00
             |               
            
                6.70
             |                           
            
                7.00
             | 
            
                6.90
             |                     
            
                7.00
             |                                 
            
                277,900
             |            
            
                 
             |                                       
         
    
        
            | 
                5/22/2015
             | 
            
                +0.10 / +1.47%
             |             
            
                6.90
             |           
            
                6.90
             |               
            
                6.70
             |                           
            
                6.90
             | 
            
                6.77
             |                     
            
                6.90
             |                                 
            
                378,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/21/2015
             | 
            
                +0.20 / +3.03%
             |             
            
                6.40
             |           
            
                6.80
             |               
            
                6.40
             |                           
            
                6.80
             | 
            
                6.60
             |                     
            
                6.80
             |                                 
            
                271,600
             |            
            
                 
             |                                       
         
    
        
            | 
                5/20/2015
             | 
            
                +0.10 / +1.54%
             |             
            
                6.30
             |           
            
                6.70
             |               
            
                6.30
             |                           
            
                6.60
             | 
            
                6.52
             |                     
            
                6.60
             |                                 
            
                414,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/19/2015
             | 
            
                +0.20 / +3.17%
             |             
            
                6.30
             |           
            
                6.50
             |               
            
                6.30
             |                           
            
                6.50
             | 
            
                6.39
             |                     
            
                6.50
             |                                 
            
                289,400
             |            
            
                 
             |                                       
         
    
        
            | 
                5/18/2015
             | 
            
                -0.20 / -3.08%
             |             
            
                6.40
             |           
            
                6.40
             |               
            
                6.20
             |                           
            
                6.30
             | 
            
                6.29
             |                     
            
                6.30
             |                                 
            
                74,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/15/2015
             | 
            
                +0.10 / +1.56%
             |             
            
                6.30
             |           
            
                6.50
             |               
            
                6.20
             |                           
            
                6.50
             | 
            
                6.36
             |                     
            
                6.50
             |                                 
            
                500,100
             |            
            
                 
             |                                       
         
    
        
            | 
                5/14/2015
             | 
            
                +0.20 / +3.23%
             |             
            
                6.20
             |           
            
                6.40
             |               
            
                6.10
             |                           
            
                6.40
             | 
            
                6.26
             |                     
            
                6.40
             |                                 
            
                259,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/13/2015
             | 
            
                +0.20 / +3.33%
             |             
            
                6.00
             |           
            
                6.20
             |               
            
                5.80
             |                           
            
                6.20
             | 
            
                6.07
             |                     
            
                6.20
             |                                 
            
                864,400
             |            
            
                 
             |                                       
         
    
        
            | 
                5/12/2015
             | 
            
                -0.10 / -1.64%
             |             
            
                6.00
             |           
            
                6.00
             |               
            
                5.80
             |                           
            
                6.00
             | 
            
                5.82
             |                     
            
                6.00
             |                                 
            
                42,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/11/2015
             | 
            
                -0.10 / -1.61%
             |             
            
                6.20
             |           
            
                6.20
             |               
            
                6.00
             |                           
            
                6.10
             | 
            
                6.08
             |                     
            
                6.10
             |                                 
            
                126,000
             |            
            
                 
             |                                       
         
    
        
            | 
                5/8/2015
             | 
            
                +0.40 / +6.90%
             |             
            
                5.80
             |           
            
                6.20
             |               
            
                5.60
             |                           
            
                6.20
             | 
            
                5.96
             |                     
            
                6.20
             |                                 
            
                151,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/7/2015
             | 
            
                0.00 / 0.00%
             |             
            
                5.80
             |           
            
                6.10
             |               
            
                5.80
             |                           
            
                5.80
             | 
            
                5.80
             |                     
            
                5.80
             |                                 
            
                76,200
             |            
            
                 
             |                                       
         
    
        
            | 
                5/6/2015
             | 
            
                0.00 / 0.00%
             |             
            
                5.80
             |           
            
                6.20
             |               
            
                5.80
             |                           
            
                5.80
             | 
            
                5.81
             |                     
            
                5.80
             |                                 
            
                56,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/5/2015
             | 
            
                -0.10 / -1.69%
             |             
            
                6.00
             |           
            
                6.00
             |               
            
                5.80
             |                           
            
                5.80
             | 
            
                5.94
             |                     
            
                5.80
             |                                 
            
                51,100
             |            
            
                 
             |                                       
         
    
        
            | 
                5/4/2015
             | 
            
                -0.60 / -9.23%
             |             
            
                6.20
             |           
            
                6.30
             |               
            
                5.90
             |                           
            
                5.90
             | 
            
                6.09
             |                     
            
                5.90
             |                                 
            
                85,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/27/2015
             | 
            
                -0.20 / -2.99%
             |             
            
                6.70
             |           
            
                6.90
             |               
            
                6.40
             |                           
            
                6.50
             | 
            
                6.59
             |                     
            
                6.50
             |                                 
            
                205,400
             |            
            
                 
             |                                       
         
    
        
            | 
                4/24/2015
             | 
            
                +0.30 / +4.69%
             |             
            
                6.30
             |           
            
                6.70
             |               
            
                6.20
             |                           
            
                6.70
             | 
            
                6.40
             |                     
            
                6.70
             |                                 
            
                324,300
             |  
            
                 
             |                                                              
             
    
         
    
    
 |