| 
                 
                    Closing price on 4/2/2015
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    5.70 | 
                 
                
                    | High | 
                    5.90 | 
                 
                
                    | Low | 
                    5.50 | 
                     
                
                    | Volume | 
                    88,100 | 
                                 
                
                    | Split-adjusted Price | 
                    5.90 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
WSS Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                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
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/13/2015
             | 
            
                0.00 / 0.00%
             |             
            
                5.40
             |           
            
                5.40
             |               
            
                5.30
             |                           
            
                5.40
             | 
            
                5.31
             |                     
            
                5.40
             |                                 
            
                20,400
             |            
            
                 
             |                                       
         
    
        
            | 
                3/12/2015
             | 
            
                0.00 / 0.00%
             |             
            
                5.40
             |           
            
                5.40
             |               
            
                5.30
             |                           
            
                5.40
             | 
            
                5.34
             |                     
            
                5.40
             |                                 
            
                12,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/11/2015
             | 
            
                0.00 / 0.00%
             |             
            
                5.30
             |           
            
                5.40
             |               
            
                5.30
             |                           
            
                5.40
             | 
            
                5.30
             |                     
            
                5.40
             |                                 
            
                11,300
             |            
            
                 
             |                                       
         
    
        
            | 
                3/10/2015
             | 
            
                0.00 / 0.00%
             |             
            
                5.40
             |           
            
                5.40
             |               
            
                5.30
             |                           
            
                5.40
             | 
            
                5.34
             |                     
            
                5.40
             |                                 
            
                83,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/9/2015
             | 
            
                0.00 / 0.00%
             |             
            
                5.40
             |           
            
                5.50
             |               
            
                5.30
             |                           
            
                5.40
             | 
            
                5.40
             |                     
            
                5.40
             |                                 
            
                129,300
             |            
            
                 
             |                                       
         
    
        
            | 
                3/6/2015
             | 
            
                0.00 / 0.00%
             |             
            
                5.40
             |           
            
                5.50
             |               
            
                5.30
             |                           
            
                5.40
             | 
            
                5.34
             |                     
            
                5.40
             |                                 
            
                89,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/5/2015
             | 
            
                -0.10 / -1.82%
             |             
            
                5.60
             |           
            
                5.60
             |               
            
                5.40
             |                           
            
                5.40
             | 
            
                5.54
             |                     
            
                5.40
             |                                 
            
                54,500
             |            
            
                 
             |                                       
         
    
        
            | 
                3/4/2015
             | 
            
                -0.10 / -1.79%
             |             
            
                5.60
             |           
            
                5.60
             |               
            
                5.40
             |                           
            
                5.50
             | 
            
                5.48
             |                     
            
                5.50
             |                                 
            
                80,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/3/2015
             | 
            
                +0.20 / +3.70%
             |             
            
                5.20
             |           
            
                5.60
             |               
            
                5.20
             |                           
            
                5.60
             | 
            
                5.40
             |                     
            
                5.60
             |                                 
            
                146,300
             |            
            
                 
             |                                       
         
    
        
            | 
                3/2/2015
             | 
            
                -0.10 / -1.82%
             |             
            
                5.50
             |           
            
                5.50
             |               
            
                5.40
             |                           
            
                5.40
             | 
            
                5.49
             |                     
            
                5.40
             |                                 
            
                68,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/27/2015
             | 
            
                +0.20 / +3.77%
             |             
            
                5.40
             |           
            
                5.60
             |               
            
                5.40
             |                           
            
                5.50
             | 
            
                5.51
             |                     
            
                5.50
             |                                 
            
                787,200
             |            
            
                 
             |                                       
         
    
        
            | 
                2/26/2015
             | 
            
                0.00 / 0.00%
             |             
            
                5.30
             |           
            
                5.40
             |               
            
                5.30
             |                           
            
                5.30
             | 
            
                5.30
             |                     
            
                5.30
             |                                 
            
                98,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/25/2015
             | 
            
                -0.40 / -7.02%
             |             
            
                5.40
             |           
            
                5.70
             |               
            
                5.30
             |                           
            
                5.30
             | 
            
                5.47
             |                     
            
                5.30
             |                                 
            
                33,100
             |            
            
                 
             |                                       
         
    
        
            | 
                2/24/2015
             | 
            
                -0.10 / -1.72%
             |             
            
                5.80
             |           
            
                5.80
             |               
            
                5.40
             |                           
            
                5.70
             | 
            
                5.45
             |                     
            
                5.70
             |                                 
            
                105,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/13/2015
             | 
            
                +0.50 / +9.43%
             |             
            
                5.10
             |           
            
                5.80
             |               
            
                5.10
             |                           
            
                5.80
             | 
            
                5.20
             |                     
            
                5.80
             |                                 
            
                85,400
             |            
            
                 
             |                                       
         
    
        
            | 
                2/12/2015
             | 
            
                0.00 / 0.00%
             |             
            
                5.30
             |           
            
                5.40
             |               
            
                5.30
             |                           
            
                5.30
             | 
            
                5.30
             |                     
            
                5.30
             |                                 
            
                5,800
             |  
            
                 
             |                                                              
             
    
         
    
    
 |