| 
                 
                    Closing price on 12/6/2011
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    5.20 | 
                 
                
                    | High | 
                    5.20 | 
                 
                
                    | Low | 
                    4.80 | 
                     
                
                    | Volume | 
                    105,100 | 
                                 
                
                    | Split-adjusted Price | 
                    4.80 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
PV2 Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                12/6/2011
             | 
            
                -0.20 / -4.00%
             |             
            
                5.20
             |           
            
                5.20
             |               
            
                4.80
             |                           
            
                4.80
             | 
            
                4.97
             |                     
            
                4.80
             |                                 
            
                105,100
             |            
            
                 
             |                                       
         
    
        
            | 
                12/5/2011
             | 
            
                +0.20 / +4.17%
             |             
            
                5.00
             |           
            
                5.00
             |               
            
                4.70
             |                           
            
                5.00
             | 
            
                4.86
             |                     
            
                5.00
             |                                 
            
                167,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/2/2011
             | 
            
                0.00 / 0.00%
             |             
            
                4.70
             |           
            
                4.80
             |               
            
                4.70
             |                           
            
                4.80
             | 
            
                4.72
             |                     
            
                4.80
             |                                 
            
                7,800
             |            
            
                 
             |                                       
         
    
        
            | 
                12/1/2011
             | 
            
                +0.20 / +4.35%
             |             
            
                4.90
             |           
            
                4.90
             |               
            
                4.30
             |                           
            
                4.80
             | 
            
                4.81
             |                     
            
                4.80
             |                                 
            
                28,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/30/2011
             | 
            
                -0.20 / -4.17%
             |             
            
                4.60
             |           
            
                4.70
             |               
            
                4.60
             |                           
            
                4.60
             | 
            
                4.60
             |                     
            
                4.60
             |                                 
            
                17,700
             |            
            
                 
             |                                       
         
    
        
            | 
                11/29/2011
             | 
            
                -0.20 / -4.00%
             |             
            
                5.00
             |           
            
                5.00
             |               
            
                4.80
             |                           
            
                4.80
             | 
            
                4.91
             |                     
            
                4.80
             |                                 
            
                11,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/28/2011
             | 
            
                -0.20 / -3.85%
             |             
            
                5.30
             |           
            
                5.50
             |               
            
                5.00
             |                           
            
                5.00
             | 
            
                5.12
             |                     
            
                5.00
             |                                 
            
                56,700
             |            
            
                 
             |                                       
         
    
        
            | 
                11/25/2011
             | 
            
                0.00 / 0.00%
             |             
            
                5.20
             |           
            
                5.20
             |               
            
                5.20
             |                           
            
                5.20
             | 
            
                5.20
             |                     
            
                5.20
             |                                 
            
                0
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/24/2011
             | 
            
                0.00 / 0.00%
             |             
            
                5.20
             |           
            
                5.20
             |               
            
                5.20
             |                           
            
                5.20
             | 
            
                5.20
             |                     
            
                5.20
             |                                 
            
                0
             |            
            
                 
             |                                       
         
    
        
            | 
                11/23/2011
             | 
            
                +0.10 / +1.96%
             |             
            
                5.10
             |           
            
                5.20
             |               
            
                5.00
             |                           
            
                5.20
             | 
            
                5.15
             |                     
            
                5.20
             |                                 
            
                4,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/22/2011
             | 
            
                +0.20 / +4.08%
             |             
            
                5.10
             |           
            
                5.10
             |               
            
                5.10
             |                           
            
                5.10
             | 
            
                5.10
             |                     
            
                5.10
             |                                 
            
                100
             |            
            
                 
             |                                       
         
    
        
            | 
                11/21/2011
             | 
            
                -0.10 / -2.00%
             |             
            
                5.00
             |           
            
                5.20
             |               
            
                4.90
             |                           
            
                4.90
             | 
            
                4.93
             |                     
            
                4.90
             |                                 
            
                32,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/18/2011
             | 
            
                0.00 / 0.00%
             |             
            
                4.90
             |           
            
                5.00
             |               
            
                4.90
             |                           
            
                5.00
             | 
            
                4.93
             |                     
            
                5.00
             |                                 
            
                29,000
             |            
            
                 
             |                                       
         
    
        
            | 
                11/17/2011
             | 
            
                -0.10 / -1.96%
             |             
            
                5.10
             |           
            
                5.10
             |               
            
                5.00
             |                           
            
                5.00
             | 
            
                5.01
             |                     
            
                5.00
             |                                 
            
                19,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/16/2011
             | 
            
                +0.10 / +2.00%
             |             
            
                5.00
             |           
            
                5.10
             |               
            
                5.00
             |                           
            
                5.10
             | 
            
                5.01
             |                     
            
                5.10
             |                                 
            
                56,900
             |            
            
                 
             |                                       
         
    
        
            | 
                11/15/2011
             | 
            
                0.00 / 0.00%
             |             
            
                5.30
             |           
            
                5.30
             |               
            
                5.00
             |                           
            
                5.00
             | 
            
                5.01
             |                     
            
                5.00
             |                                 
            
                9,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/14/2011
             | 
            
                0.00 / 0.00%
             |             
            
                4.90
             |           
            
                5.00
             |               
            
                4.90
             |                           
            
                5.00
             | 
            
                5.00
             |                     
            
                5.00
             |                                 
            
                46,000
             |            
            
                 
             |                                       
         
    
        
            | 
                11/11/2011
             | 
            
                0.00 / 0.00%
             |             
            
                5.00
             |           
            
                5.00
             |               
            
                5.00
             |                           
            
                5.00
             | 
            
                5.00
             |                     
            
                5.00
             |                                 
            
                22,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/10/2011
             | 
            
                -0.10 / -1.96%
             |             
            
                5.00
             |           
            
                5.00
             |               
            
                5.00
             |                           
            
                5.00
             | 
            
                5.00
             |                     
            
                5.00
             |                                 
            
                15,000
             |            
            
                 
             |                                       
         
    
        
            | 
                11/9/2011
             | 
            
                -0.20 / -3.77%
             |             
            
                5.20
             |           
            
                5.20
             |               
            
                5.10
             |                           
            
                5.10
             | 
            
                5.14
             |                     
            
                5.10
             |                                 
            
                38,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/8/2011
             | 
            
                +0.20 / +3.92%
             |             
            
                5.20
             |           
            
                5.30
             |               
            
                5.20
             |                           
            
                5.30
             | 
            
                5.21
             |                     
            
                5.30
             |                                 
            
                29,700
             |            
            
                 
             |                                       
         
    
        
            | 
                11/7/2011
             | 
            
                -0.30 / -5.56%
             |             
            
                5.30
             |           
            
                5.30
             |               
            
                5.10
             |                           
            
                5.10
             | 
            
                5.19
             |                     
            
                5.10
             |                                 
            
                28,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/4/2011
             | 
            
                +0.10 / +1.89%
             |             
            
                5.30
             |           
            
                5.40
             |               
            
                5.30
             |                           
            
                5.40
             | 
            
                5.30
             |                     
            
                5.40
             |                                 
            
                33,600
             |            
            
                 
             |                                       
         
    
        
            | 
                11/3/2011
             | 
            
                -0.10 / -1.85%
             |             
            
                5.30
             |           
            
                5.30
             |               
            
                5.30
             |                           
            
                5.30
             | 
            
                5.30
             |                     
            
                5.30
             |                                 
            
                14,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/2/2011
             | 
            
                0.00 / 0.00%
             |             
            
                5.40
             |           
            
                5.40
             |               
            
                5.30
             |                           
            
                5.40
             | 
            
                5.34
             |                     
            
                5.40
             |                                 
            
                27,200
             |            
            
                 
             |                                       
         
    
        
            | 
                11/1/2011
             | 
            
                -0.10 / -1.82%
             |             
            
                5.50
             |           
            
                5.60
             |               
            
                5.40
             |                           
            
                5.40
             | 
            
                5.53
             |                     
            
                5.40
             |                                 
            
                66,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/31/2011
             | 
            
                -0.20 / -3.51%
             |             
            
                5.90
             |           
            
                5.90
             |               
            
                5.50
             |                           
            
                5.50
             | 
            
                5.71
             |                     
            
                5.50
             |                                 
            
                46,200
             |            
            
                 
             |                                       
         
    
        
            | 
                10/28/2011
             | 
            
                +0.20 / +3.64%
             |             
            
                5.50
             |           
            
                5.70
             |               
            
                5.50
             |                           
            
                5.70
             | 
            
                5.65
             |                     
            
                5.70
             |                                 
            
                87,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/27/2011
             | 
            
                +0.20 / +3.77%
             |             
            
                5.40
             |           
            
                5.50
             |               
            
                5.40
             |                           
            
                5.50
             | 
            
                5.43
             |                     
            
                5.50
             |                                 
            
                44,300
             |            
            
                 
             |                                       
         
    
        
            | 
                10/26/2011
             | 
            
                0.00 / 0.00%
             |             
            
                5.60
             |           
            
                5.60
             |               
            
                5.30
             |                           
            
                5.30
             | 
            
                5.30
             |                     
            
                5.30
             |                                 
            
                43,700
             |  
            
                 
             |                                                              
             
    
         
    
    
 |