| 
                 
                    Closing price on 6/4/2013
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    5.80 | 
                 
                
                    | High | 
                    5.90 | 
                 
                
                    | Low | 
                    5.40 | 
                     
                
                    | Volume | 
                    2,873,320 | 
                                 
                
                    | Split-adjusted Price | 
                    1.93 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
PVT Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                6/4/2013
             | 
            
                -0.40 / -6.90%
             |             
            
                5.80
             |           
            
                5.90
             |               
            
                5.40
             |                           
            
                5.40
             | 
            
                5.40
             |                     
            
                1.93
             |                                 
            
                2,873,320
             |            
            
                 
             |                                       
         
    
        
            | 
                6/3/2013
             | 
            
                +0.10 / +1.75%
             |             
            
                5.80
             |           
            
                6.00
             |               
            
                5.70
             |                           
            
                5.80
             | 
            
                5.80
             |                     
            
                2.07
             |                                 
            
                2,311,310
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/31/2013
             | 
            
                -0.10 / -1.72%
             |             
            
                6.00
             |           
            
                6.20
             |               
            
                5.70
             |                           
            
                5.70
             | 
            
                5.70
             |                     
            
                2.04
             |                                 
            
                2,895,520
             |            
            
                 
             |                                       
         
    
        
            | 
                5/30/2013
             | 
            
                +0.30 / +5.45%
             |             
            
                5.80
             |           
            
                5.80
             |               
            
                5.60
             |                           
            
                5.80
             | 
            
                5.80
             |                     
            
                2.07
             |                                 
            
                7,220,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/29/2013
             | 
            
                +0.30 / +5.77%
             |             
            
                5.50
             |           
            
                5.50
             |               
            
                5.50
             |                           
            
                5.50
             | 
            
                5.50
             |                     
            
                1.97
             |                                 
            
                1,671,480
             |            
            
                 
             |                                       
         
    
        
            | 
                5/28/2013
             | 
            
                +0.30 / +6.12%
             |             
            
                5.20
             |           
            
                5.20
             |               
            
                5.20
             |                           
            
                5.20
             | 
            
                5.20
             |                     
            
                1.86
             |                                 
            
                469,860
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/27/2013
             | 
            
                +0.30 / +6.52%
             |             
            
                4.70
             |           
            
                4.90
             |               
            
                4.70
             |                           
            
                4.90
             | 
            
                4.90
             |                     
            
                1.75
             |                                 
            
                2,695,110
             |            
            
                 
             |                                       
         
    
        
            | 
                5/24/2013
             | 
            
                0.00 / 0.00%
             |             
            
                4.50
             |           
            
                4.70
             |               
            
                4.50
             |                           
            
                4.60
             | 
            
                4.60
             |                     
            
                1.64
             |                                 
            
                607,610
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/23/2013
             | 
            
                -0.10 / -2.13%
             |             
            
                4.70
             |           
            
                4.80
             |               
            
                4.60
             |                           
            
                4.60
             | 
            
                4.60
             |                     
            
                1.64
             |                                 
            
                721,440
             |            
            
                 
             |                                       
         
    
        
            | 
                5/22/2013
             | 
            
                +0.10 / +2.17%
             |             
            
                4.80
             |           
            
                4.90
             |               
            
                4.70
             |                           
            
                4.70
             | 
            
                4.70
             |                     
            
                1.68
             |                                 
            
                1,538,650
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/21/2013
             | 
            
                +0.30 / +6.98%
             |             
            
                4.40
             |           
            
                4.60
             |               
            
                4.40
             |                           
            
                4.60
             | 
            
                4.60
             |                     
            
                1.64
             |                                 
            
                2,047,910
             |            
            
                 
             |                                       
         
    
        
            | 
                5/20/2013
             | 
            
                0.00 / 0.00%
             |             
            
                4.30
             |           
            
                4.40
             |               
            
                4.20
             |                           
            
                4.30
             | 
            
                4.30
             |                     
            
                1.54
             |                                 
            
                276,440
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/17/2013
             | 
            
                0.00 / 0.00%
             |             
            
                4.30
             |           
            
                4.40
             |               
            
                4.30
             |                           
            
                4.30
             | 
            
                4.30
             |                     
            
                1.54
             |                                 
            
                460,910
             |            
            
                 
             |                                       
         
    
        
            | 
                5/16/2013
             | 
            
                0.00 / 0.00%
             |             
            
                4.30
             |           
            
                4.40
             |               
            
                4.30
             |                           
            
                4.30
             | 
            
                4.30
             |                     
            
                1.54
             |                                 
            
                201,020
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/15/2013
             | 
            
                -0.10 / -2.27%
             |             
            
                4.40
             |           
            
                4.40
             |               
            
                4.30
             |                           
            
                4.30
             | 
            
                4.30
             |                     
            
                1.54
             |                                 
            
                154,720
             |            
            
                 
             |                                       
         
    
        
            | 
                5/14/2013
             | 
            
                0.00 / 0.00%
             |             
            
                4.40
             |           
            
                4.40
             |               
            
                4.30
             |                           
            
                4.40
             | 
            
                4.40
             |                     
            
                1.57
             |                                 
            
                425,910
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/13/2013
             | 
            
                +0.10 / +2.33%
             |             
            
                4.40
             |           
            
                4.50
             |               
            
                4.40
             |                           
            
                4.40
             | 
            
                4.40
             |                     
            
                1.57
             |                                 
            
                1,165,150
             |            
            
                 
             |                                       
         
    
        
            | 
                5/10/2013
             | 
            
                -0.10 / -2.27%
             |             
            
                4.50
             |           
            
                4.50
             |               
            
                4.30
             |                           
            
                4.30
             | 
            
                4.30
             |                     
            
                1.54
             |                                 
            
                731,580
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/9/2013
             | 
            
                0.00 / 0.00%
             |             
            
                4.40
             |           
            
                4.50
             |               
            
                4.30
             |                           
            
                4.40
             | 
            
                4.40
             |                     
            
                1.57
             |                                 
            
                419,120
             |            
            
                 
             |                                       
         
    
        
            | 
                5/8/2013
             | 
            
                -0.10 / -2.22%
             |             
            
                4.50
             |           
            
                4.50
             |               
            
                4.40
             |                           
            
                4.40
             | 
            
                4.40
             |                     
            
                1.57
             |                                 
            
                264,640
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/7/2013
             | 
            
                -0.10 / -2.17%
             |             
            
                4.60
             |           
            
                4.70
             |               
            
                4.40
             |                           
            
                4.50
             | 
            
                4.50
             |                     
            
                1.61
             |                                 
            
                283,240
             |            
            
                 
             |                                       
         
    
        
            | 
                5/6/2013
             | 
            
                +0.30 / +6.98%
             |             
            
                4.50
             |           
            
                4.60
             |               
            
                4.40
             |                           
            
                4.60
             | 
            
                4.60
             |                     
            
                1.64
             |                                 
            
                1,317,970
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/3/2013
             | 
            
                0.00 / 0.00%
             |             
            
                4.30
             |           
            
                4.40
             |               
            
                4.20
             |                           
            
                4.30
             | 
            
                4.30
             |                     
            
                1.54
             |                                 
            
                334,930
             |            
            
                 
             |                                       
         
    
        
            | 
                5/2/2013
             | 
            
                +0.10 / +2.38%
             |             
            
                4.20
             |           
            
                4.30
             |               
            
                4.10
             |                           
            
                4.30
             | 
            
                4.30
             |                     
            
                1.54
             |                                 
            
                187,450
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/26/2013
             | 
            
                0.00 / 0.00%
             |             
            
                4.20
             |           
            
                4.30
             |               
            
                4.20
             |                           
            
                4.20
             | 
            
                4.20
             |                     
            
                1.50
             |                                 
            
                135,590
             |            
            
                 
             |                                       
         
    
        
            | 
                4/25/2013
             | 
            
                0.00 / 0.00%
             |             
            
                4.20
             |           
            
                4.30
             |               
            
                4.10
             |                           
            
                4.20
             | 
            
                4.20
             |                     
            
                1.50
             |                                 
            
                624,530
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/24/2013
             | 
            
                -0.10 / -2.33%
             |             
            
                4.40
             |           
            
                4.40
             |               
            
                4.20
             |                           
            
                4.20
             | 
            
                4.20
             |                     
            
                1.50
             |                                 
            
                166,060
             |            
            
                 
             |                                       
         
    
        
            | 
                4/23/2013
             | 
            
                +0.10 / +2.38%
             |             
            
                4.20
             |           
            
                4.40
             |               
            
                4.20
             |                           
            
                4.30
             | 
            
                4.30
             |                     
            
                1.54
             |                                 
            
                185,270
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/22/2013
             | 
            
                -0.10 / -2.33%
             |             
            
                4.30
             |           
            
                4.40
             |               
            
                4.20
             |                           
            
                4.20
             | 
            
                4.20
             |                     
            
                1.50
             |                                 
            
                333,620
             |            
            
                 
             |                                       
         
    
        
            | 
                4/18/2013
             | 
            
                0.00 / 0.00%
             |             
            
                4.40
             |           
            
                4.40
             |               
            
                4.20
             |                           
            
                4.30
             | 
            
                4.30
             |                     
            
                1.54
             |                                 
            
                408,870
             |  
            
                 
             |                                                              
             
    
         
    
    
 |