| 
                 
                    Closing price on 4/24/2015
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    6.30 | 
                 
                
                    | High | 
                    6.70 | 
                 
                
                    | Low | 
                    6.20 | 
                     
                
                    | Volume | 
                    324,300 | 
                                 
                
                    | Split-adjusted Price | 
                    6.70 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
WSS Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                4/24/2015
             | 
            
                +0.30 / +4.69%
             |             
            
                6.30
             |           
            
                6.70
             |               
            
                6.20
             |                           
            
                6.70
             | 
            
                6.40
             |                     
            
                6.70
             |                                 
            
                324,300
             |            
            
                 
             |                                       
         
    
        
            | 
                4/23/2015
             | 
            
                0.00 / 0.00%
             |             
            
                5.80
             |           
            
                6.40
             |               
            
                5.80
             |                           
            
                6.40
             | 
            
                6.22
             |                     
            
                6.40
             |                                 
            
                87,803
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/22/2015
             | 
            
                -0.10 / -1.54%
             |             
            
                6.50
             |           
            
                6.50
             |               
            
                6.30
             |                           
            
                6.40
             | 
            
                6.40
             |                     
            
                6.40
             |                                 
            
                108,700
             |            
            
                 
             |                                       
         
    
        
            | 
                4/21/2015
             | 
            
                +0.10 / +1.56%
             |             
            
                6.40
             |           
            
                6.60
             |               
            
                6.20
             |                           
            
                6.50
             | 
            
                6.30
             |                     
            
                6.50
             |                                 
            
                307,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/20/2015
             | 
            
                -0.10 / -1.54%
             |             
            
                6.50
             |           
            
                6.50
             |               
            
                6.20
             |                           
            
                6.40
             | 
            
                6.39
             |                     
            
                6.40
             |                                 
            
                391,900
             |            
            
                 
             |                                       
         
    
        
            | 
                4/17/2015
             | 
            
                0.00 / 0.00%
             |             
            
                6.40
             |           
            
                6.60
             |               
            
                6.30
             |                           
            
                6.50
             | 
            
                6.43
             |                     
            
                6.50
             |                                 
            
                400,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/16/2015
             | 
            
                +0.20 / +3.17%
             |             
            
                6.30
             |           
            
                6.50
             |               
            
                6.20
             |                           
            
                6.50
             | 
            
                6.37
             |                     
            
                6.50
             |                                 
            
                283,500
             |            
            
                 
             |                                       
         
    
        
            | 
                4/15/2015
             | 
            
                +0.10 / +1.61%
             |             
            
                6.20
             |           
            
                6.30
             |               
            
                6.10
             |                           
            
                6.30
             | 
            
                6.22
             |                     
            
                6.30
             |                                 
            
                126,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/14/2015
             | 
            
                -0.20 / -3.13%
             |             
            
                6.30
             |           
            
                6.30
             |               
            
                6.10
             |                           
            
                6.20
             | 
            
                6.17
             |                     
            
                6.20
             |                                 
            
                308,100
             |            
            
                 
             |                                       
         
    
        
            | 
                4/13/2015
             | 
            
                0.00 / 0.00%
             |             
            
                6.40
             |           
            
                6.40
             |               
            
                6.20
             |                           
            
                6.40
             | 
            
                6.28
             |                     
            
                6.40
             |                                 
            
                132,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/10/2015
             | 
            
                0.00 / 0.00%
             |             
            
                6.40
             |           
            
                6.50
             |               
            
                6.30
             |                           
            
                6.40
             | 
            
                6.40
             |                     
            
                6.40
             |                                 
            
                145,600
             |            
            
                 
             |                                       
         
    
        
            | 
                4/9/2015
             | 
            
                +0.30 / +4.92%
             |             
            
                6.10
             |           
            
                6.70
             |               
            
                6.10
             |                           
            
                6.40
             | 
            
                6.41
             |                     
            
                6.40
             |                                 
            
                785,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/8/2015
             | 
            
                +0.10 / +1.67%
             |             
            
                6.00
             |           
            
                6.20
             |               
            
                6.00
             |                           
            
                6.10
             | 
            
                6.05
             |                     
            
                6.10
             |                                 
            
                157,000
             |            
            
                 
             |                                       
         
    
        
            | 
                4/7/2015
             | 
            
                +0.20 / +3.45%
             |             
            
                5.90
             |           
            
                6.10
             |               
            
                5.80
             |                           
            
                6.00
             | 
            
                5.96
             |                     
            
                6.00
             |                                 
            
                188,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/6/2015
             | 
            
                -0.30 / -4.92%
             |             
            
                6.00
             |           
            
                6.10
             |               
            
                5.80
             |                           
            
                5.80
             | 
            
                5.96
             |                     
            
                5.80
             |                                 
            
                61,800
             |            
            
                 
             |                                       
         
    
        
            | 
                4/3/2015
             | 
            
                +0.20 / +3.39%
             |             
            
                5.80
             |           
            
                6.10
             |               
            
                5.80
             |                           
            
                6.10
             | 
            
                5.88
             |                     
            
                6.10
             |                                 
            
                256,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/2/2015
             | 
            
                +0.20 / +3.51%
             |             
            
                5.70
             |           
            
                5.90
             |               
            
                5.50
             |                           
            
                5.90
             | 
            
                5.76
             |                     
            
                5.90
             |                                 
            
                88,100
             |            
            
                 
             |                                       
         
    
        
            | 
                4/1/2015
             | 
            
                -0.10 / -1.72%
             |             
            
                5.70
             |           
            
                5.70
             |               
            
                5.40
             |                           
            
                5.70
             | 
            
                5.64
             |                     
            
                5.70
             |                                 
            
                145,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/31/2015
             | 
            
                +0.10 / +1.75%
             |             
            
                5.70
             |           
            
                5.90
             |               
            
                5.60
             |                           
            
                5.80
             | 
            
                5.72
             |                     
            
                5.80
             |                                 
            
                293,700
             |            
            
                 
             |                                       
         
    
        
            | 
                3/30/2015
             | 
            
                0.00 / 0.00%
             |             
            
                5.70
             |           
            
                5.70
             |               
            
                5.50
             |                           
            
                5.70
             | 
            
                5.63
             |                     
            
                5.70
             |                                 
            
                90,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/27/2015
             | 
            
                -0.10 / -1.72%
             |             
            
                5.70
             |           
            
                5.80
             |               
            
                5.60
             |                           
            
                5.70
             | 
            
                5.70
             |                     
            
                5.70
             |                                 
            
                126,100
             |            
            
                 
             |                                       
         
    
        
            | 
                3/26/2015
             | 
            
                +0.10 / +1.75%
             |             
            
                5.60
             |           
            
                5.80
             |               
            
                5.60
             |                           
            
                5.80
             | 
            
                5.66
             |                     
            
                5.80
             |                                 
            
                218,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/25/2015
             | 
            
                +0.20 / +3.64%
             |             
            
                5.50
             |           
            
                5.80
             |               
            
                5.40
             |                           
            
                5.70
             | 
            
                5.65
             |                     
            
                5.70
             |                                 
            
                316,300
             |            
            
                 
             |                                       
         
    
        
            | 
                3/24/2015
             | 
            
                0.00 / 0.00%
             |             
            
                5.50
             |           
            
                5.50
             |               
            
                5.40
             |                           
            
                5.50
             | 
            
                5.40
             |                     
            
                5.50
             |                                 
            
                127,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/23/2015
             | 
            
                0.00 / 0.00%
             |             
            
                5.50
             |           
            
                5.60
             |               
            
                5.50
             |                           
            
                5.50
             | 
            
                5.50
             |                     
            
                5.50
             |                                 
            
                59,400
             |            
            
                 
             |                                       
         
    
        
            | 
                3/20/2015
             | 
            
                0.00 / 0.00%
             |             
            
                5.50
             |           
            
                5.60
             |               
            
                5.40
             |                           
            
                5.50
             | 
            
                5.50
             |                     
            
                5.50
             |                                 
            
                161,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/19/2015
             | 
            
                0.00 / 0.00%
             |             
            
                5.50
             |           
            
                5.50
             |               
            
                5.40
             |                           
            
                5.50
             | 
            
                5.43
             |                     
            
                5.50
             |                                 
            
                227,100
             |            
            
                 
             |                                       
         
    
        
            | 
                3/18/2015
             | 
            
                0.00 / 0.00%
             |             
            
                5.40
             |           
            
                5.50
             |               
            
                5.30
             |                           
            
                5.50
             | 
            
                5.41
             |                     
            
                5.50
             |                                 
            
                120,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/17/2015
             | 
            
                +0.10 / +1.85%
             |             
            
                5.30
             |           
            
                5.50
             |               
            
                5.30
             |                           
            
                5.50
             | 
            
                5.40
             |                     
            
                5.50
             |                                 
            
                47,500
             |            
            
                 
             |                                       
         
    
        
            | 
                3/16/2015
             | 
            
                0.00 / 0.00%
             |             
            
                5.40
             |           
            
                5.40
             |               
            
                5.30
             |                           
            
                5.40
             | 
            
                5.30
             |                     
            
                5.40
             |                                 
            
                27,300
             |  
            
                 
             |                                                              
             
    
         
    
    
 |