| 
                 
                    Closing price on 9/4/2012
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    4.60 | 
                 
                
                    | High | 
                    4.70 | 
                 
                
                    | Low | 
                    4.60 | 
                     
                
                    | Volume | 
                    488,990 | 
                                 
                
                    | Split-adjusted Price | 
                    1.68 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
PVT Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                9/4/2012
             | 
            
                +0.20 / +4.44%
             |             
            
                4.60
             |           
            
                4.70
             |               
            
                4.60
             |                           
            
                4.70
             | 
            
                4.70
             |                     
            
                1.68
             |                                 
            
                488,990
             |            
            
                 
             |                                       
         
    
        
            | 
                8/31/2012
             | 
            
                -0.10 / -2.17%
             |             
            
                4.60
             |           
            
                4.70
             |               
            
                4.50
             |                           
            
                4.50
             | 
            
                4.50
             |                     
            
                1.61
             |                                 
            
                98,070
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/30/2012
             | 
            
                +0.10 / +2.22%
             |             
            
                4.60
             |           
            
                4.70
             |               
            
                4.60
             |                           
            
                4.60
             | 
            
                4.60
             |                     
            
                1.64
             |                                 
            
                199,130
             |            
            
                 
             |                                       
         
    
        
            | 
                8/29/2012
             | 
            
                +0.20 / +4.65%
             |             
            
                4.50
             |           
            
                4.50
             |               
            
                4.40
             |                           
            
                4.50
             | 
            
                4.50
             |                     
            
                1.61
             |                                 
            
                354,150
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/28/2012
             | 
            
                -0.10 / -2.27%
             |             
            
                4.40
             |           
            
                4.40
             |               
            
                4.20
             |                           
            
                4.30
             | 
            
                4.30
             |                     
            
                1.54
             |                                 
            
                301,490
             |            
            
                 
             |                                       
         
    
        
            | 
                8/27/2012
             | 
            
                -0.20 / -4.35%
             |             
            
                4.50
             |           
            
                4.60
             |               
            
                4.40
             |                           
            
                4.40
             | 
            
                4.40
             |                     
            
                1.57
             |                                 
            
                724,740
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/24/2012
             | 
            
                0.00 / 0.00%
             |             
            
                4.40
             |           
            
                4.80
             |               
            
                4.40
             |                           
            
                4.60
             | 
            
                4.60
             |                     
            
                1.64
             |                                 
            
                935,140
             |            
            
                 
             |                                       
         
    
        
            | 
                8/23/2012
             | 
            
                -0.20 / -4.17%
             |             
            
                4.70
             |           
            
                4.70
             |               
            
                4.60
             |                           
            
                4.60
             | 
            
                4.60
             |                     
            
                1.64
             |                                 
            
                262,440
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/22/2012
             | 
            
                -0.20 / -4.00%
             |             
            
                4.80
             |           
            
                5.00
             |               
            
                4.80
             |                           
            
                4.80
             | 
            
                4.80
             |                     
            
                1.72
             |                                 
            
                1,072,310
             |            
            
                 
             |                                       
         
    
        
            | 
                8/21/2012
             | 
            
                -0.20 / -3.85%
             |             
            
                5.10
             |           
            
                5.10
             |               
            
                5.00
             |                           
            
                5.00
             | 
            
                5.00
             |                     
            
                1.79
             |                                 
            
                627,980
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/20/2012
             | 
            
                0.00 / 0.00%
             |             
            
                5.20
             |           
            
                5.30
             |               
            
                5.10
             |                           
            
                5.20
             | 
            
                5.20
             |                     
            
                1.86
             |                                 
            
                357,230
             |            
            
                 
             |                                       
         
    
        
            | 
                8/17/2012
             | 
            
                +0.10 / +1.96%
             |             
            
                5.10
             |           
            
                5.20
             |               
            
                5.10
             |                           
            
                5.20
             | 
            
                5.20
             |                     
            
                1.86
             |                                 
            
                674,720
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/16/2012
             | 
            
                -0.10 / -1.92%
             |             
            
                5.10
             |           
            
                5.20
             |               
            
                5.10
             |                           
            
                5.10
             | 
            
                5.10
             |                     
            
                1.82
             |                                 
            
                174,540
             |            
            
                 
             |                                       
         
    
        
            | 
                8/15/2012
             | 
            
                0.00 / 0.00%
             |             
            
                5.20
             |           
            
                5.30
             |               
            
                5.10
             |                           
            
                5.20
             | 
            
                5.20
             |                     
            
                1.86
             |                                 
            
                515,330
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/14/2012
             | 
            
                +0.10 / +1.96%
             |             
            
                5.20
             |           
            
                5.30
             |               
            
                5.10
             |                           
            
                5.20
             | 
            
                5.20
             |                     
            
                1.86
             |                                 
            
                531,270
             |            
            
                 
             |                                       
         
    
        
            | 
                8/13/2012
             | 
            
                -0.10 / -1.92%
             |             
            
                5.20
             |           
            
                5.20
             |               
            
                5.00
             |                           
            
                5.10
             | 
            
                5.10
             |                     
            
                1.82
             |                                 
            
                389,330
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/10/2012
             | 
            
                0.00 / 0.00%
             |             
            
                5.10
             |           
            
                5.20
             |               
            
                5.00
             |                           
            
                5.20
             | 
            
                5.20
             |                     
            
                1.86
             |                                 
            
                401,010
             |            
            
                 
             |                                       
         
    
        
            | 
                8/9/2012
             | 
            
                -0.10 / -1.89%
             |             
            
                5.30
             |           
            
                5.40
             |               
            
                5.20
             |                           
            
                5.20
             | 
            
                5.20
             |                     
            
                1.86
             |                                 
            
                906,350
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/8/2012
             | 
            
                +0.20 / +3.92%
             |             
            
                5.20
             |           
            
                5.30
             |               
            
                5.10
             |                           
            
                5.30
             | 
            
                5.30
             |                     
            
                1.89
             |                                 
            
                466,170
             |            
            
                 
             |                                       
         
    
        
            | 
                8/7/2012
             | 
            
                0.00 / 0.00%
             |             
            
                5.10
             |           
            
                5.30
             |               
            
                5.10
             |                           
            
                5.10
             | 
            
                5.10
             |                     
            
                1.82
             |                                 
            
                874,190
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/6/2012
             | 
            
                +0.20 / +4.08%
             |             
            
                4.90
             |           
            
                5.10
             |               
            
                4.90
             |                           
            
                5.10
             | 
            
                5.10
             |                     
            
                1.82
             |                                 
            
                397,850
             |            
            
                 
             |                                       
         
    
        
            | 
                8/3/2012
             | 
            
                0.00 / 0.00%
             |             
            
                4.90
             |           
            
                5.00
             |               
            
                4.90
             |                           
            
                4.90
             | 
            
                4.90
             |                     
            
                1.75
             |                                 
            
                181,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/2/2012
             | 
            
                0.00 / 0.00%
             |             
            
                5.00
             |           
            
                5.00
             |               
            
                4.90
             |                           
            
                4.90
             | 
            
                4.90
             |                     
            
                1.75
             |                                 
            
                151,010
             |            
            
                 
             |                                       
         
    
        
            | 
                8/1/2012
             | 
            
                -0.10 / -2.00%
             |             
            
                5.00
             |           
            
                5.00
             |               
            
                4.80
             |                           
            
                4.90
             | 
            
                4.90
             |                     
            
                1.75
             |                                 
            
                376,660
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/31/2012
             | 
            
                0.00 / 0.00%
             |             
            
                5.10
             |           
            
                5.10
             |               
            
                4.90
             |                           
            
                5.00
             | 
            
                5.00
             |                     
            
                1.79
             |                                 
            
                213,010
             |            
            
                 
             |                                       
         
    
        
            | 
                7/30/2012
             | 
            
                0.00 / 0.00%
             |             
            
                4.90
             |           
            
                5.10
             |               
            
                4.90
             |                           
            
                5.00
             | 
            
                5.00
             |                     
            
                1.79
             |                                 
            
                162,670
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/27/2012
             | 
            
                -0.10 / -1.96%
             |             
            
                5.20
             |           
            
                5.20
             |               
            
                5.00
             |                           
            
                5.00
             | 
            
                5.00
             |                     
            
                1.79
             |                                 
            
                369,010
             |            
            
                 
             |                                       
         
    
        
            | 
                7/26/2012
             | 
            
                -0.10 / -1.92%
             |             
            
                5.20
             |           
            
                5.30
             |               
            
                5.10
             |                           
            
                5.10
             | 
            
                5.10
             |                     
            
                1.82
             |                                 
            
                486,350
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/25/2012
             | 
            
                +0.20 / +4.00%
             |             
            
                5.10
             |           
            
                5.20
             |               
            
                5.00
             |                           
            
                5.20
             | 
            
                5.20
             |                     
            
                1.86
             |                                 
            
                703,680
             |            
            
                 
             |                                       
         
    
        
            | 
                7/24/2012
             | 
            
                -0.20 / -3.85%
             |             
            
                5.10
             |           
            
                5.10
             |               
            
                5.00
             |                           
            
                5.00
             | 
            
                5.00
             |                     
            
                1.79
             |                                 
            
                699,920
             |  
            
                 
             |                                                              
             
    
         
    
    
 |