| 
                 
                    Closing price on 6/28/2012
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    5.00 | 
                 
                
                    | High | 
                    5.00 | 
                 
                
                    | Low | 
                    4.80 | 
                     
                
                    | Volume | 
                    874,180 | 
                                 
                
                    | Split-adjusted Price | 
                    1.75 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
PVT Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                6/28/2012
             | 
            
                -0.10 / -2.00%
             |             
            
                5.00
             |           
            
                5.00
             |               
            
                4.80
             |                           
            
                4.90
             | 
            
                4.90
             |                     
            
                1.75
             |                                 
            
                874,180
             |            
            
                 
             |                                       
         
    
        
            | 
                6/27/2012
             | 
            
                -0.20 / -3.85%
             |             
            
                5.10
             |           
            
                5.30
             |               
            
                5.00
             |                           
            
                5.00
             | 
            
                5.00
             |                     
            
                1.79
             |                                 
            
                577,950
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/26/2012
             | 
            
                -0.20 / -3.70%
             |             
            
                5.30
             |           
            
                5.30
             |               
            
                5.20
             |                           
            
                5.20
             | 
            
                5.20
             |                     
            
                1.86
             |                                 
            
                777,660
             |            
            
                 
             |                                       
         
    
        
            | 
                6/25/2012
             | 
            
                -0.20 / -3.57%
             |             
            
                5.60
             |           
            
                5.70
             |               
            
                5.40
             |                           
            
                5.40
             | 
            
                5.40
             |                     
            
                1.93
             |                                 
            
                697,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/22/2012
             | 
            
                -0.10 / -1.75%
             |             
            
                5.70
             |           
            
                5.70
             |               
            
                5.50
             |                           
            
                5.60
             | 
            
                5.60
             |                     
            
                2.00
             |                                 
            
                730,510
             |            
            
                 
             |                                       
         
    
        
            | 
                6/21/2012
             | 
            
                -0.20 / -3.39%
             |             
            
                5.90
             |           
            
                5.90
             |               
            
                5.70
             |                           
            
                5.70
             | 
            
                5.70
             |                     
            
                2.04
             |                                 
            
                891,810
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/20/2012
             | 
            
                +0.10 / +1.72%
             |             
            
                5.80
             |           
            
                5.90
             |               
            
                5.70
             |                           
            
                5.90
             | 
            
                5.90
             |                     
            
                2.11
             |                                 
            
                273,940
             |            
            
                 
             |                                       
         
    
        
            | 
                6/19/2012
             | 
            
                -0.10 / -1.69%
             |             
            
                5.90
             |           
            
                5.90
             |               
            
                5.70
             |                           
            
                5.80
             | 
            
                5.80
             |                     
            
                2.07
             |                                 
            
                341,060
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/18/2012
             | 
            
                0.00 / 0.00%
             |             
            
                6.10
             |           
            
                6.10
             |               
            
                5.80
             |                           
            
                5.90
             | 
            
                5.90
             |                     
            
                2.11
             |                                 
            
                589,310
             |            
            
                 
             |                                       
         
    
        
            | 
                6/15/2012
             | 
            
                +0.20 / +3.51%
             |             
            
                5.80
             |           
            
                5.90
             |               
            
                5.70
             |                           
            
                5.90
             | 
            
                5.90
             |                     
            
                2.11
             |                                 
            
                631,630
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/14/2012
             | 
            
                0.00 / 0.00%
             |             
            
                5.80
             |           
            
                5.80
             |               
            
                5.70
             |                           
            
                5.70
             | 
            
                5.70
             |                     
            
                2.04
             |                                 
            
                328,890
             |            
            
                 
             |                                       
         
    
        
            | 
                6/13/2012
             | 
            
                0.00 / 0.00%
             |             
            
                5.70
             |           
            
                5.90
             |               
            
                5.60
             |                           
            
                5.70
             | 
            
                5.70
             |                     
            
                2.04
             |                                 
            
                409,280
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/12/2012
             | 
            
                -0.30 / -5.00%
             |             
            
                6.00
             |           
            
                6.00
             |               
            
                5.70
             |                           
            
                5.70
             | 
            
                5.70
             |                     
            
                2.04
             |                                 
            
                694,680
             |            
            
                 
             |                                       
         
    
        
            | 
                6/11/2012
             | 
            
                0.00 / 0.00%
             |             
            
                6.00
             |           
            
                6.20
             |               
            
                5.90
             |                           
            
                6.00
             | 
            
                6.00
             |                     
            
                2.14
             |                                 
            
                646,410
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/8/2012
             | 
            
                0.00 / 0.00%
             |             
            
                6.20
             |           
            
                6.30
             |               
            
                5.90
             |                           
            
                6.00
             | 
            
                6.00
             |                     
            
                2.14
             |                                 
            
                1,162,610
             |            
            
                 
             |                                       
         
    
        
            | 
                6/7/2012
             | 
            
                +0.20 / +3.45%
             |             
            
                5.90
             |           
            
                6.00
             |               
            
                5.90
             |                           
            
                6.00
             | 
            
                6.00
             |                     
            
                2.14
             |                                 
            
                1,306,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/6/2012
             | 
            
                +0.20 / +3.57%
             |             
            
                5.60
             |           
            
                5.80
             |               
            
                5.50
             |                           
            
                5.80
             | 
            
                5.80
             |                     
            
                2.07
             |                                 
            
                693,230
             |            
            
                 
             |                                       
         
    
        
            | 
                6/5/2012
             | 
            
                +0.10 / +1.82%
             |             
            
                5.40
             |           
            
                5.60
             |               
            
                5.30
             |                           
            
                5.60
             | 
            
                5.60
             |                     
            
                2.00
             |                                 
            
                776,440
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/4/2012
             | 
            
                -0.20 / -3.51%
             |             
            
                5.60
             |           
            
                5.70
             |               
            
                5.50
             |                           
            
                5.50
             | 
            
                5.50
             |                     
            
                1.97
             |                                 
            
                697,040
             |            
            
                 
             |                                       
         
    
        
            | 
                6/1/2012
             | 
            
                0.00 / 0.00%
             |             
            
                5.80
             |           
            
                5.90
             |               
            
                5.70
             |                           
            
                5.70
             | 
            
                5.70
             |                     
            
                2.04
             |                                 
            
                312,270
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/31/2012
             | 
            
                -0.30 / -5.00%
             |             
            
                5.90
             |           
            
                6.00
             |               
            
                5.70
             |                           
            
                5.70
             | 
            
                5.70
             |                     
            
                2.04
             |                                 
            
                479,640
             |            
            
                 
             |                                       
         
    
        
            | 
                5/30/2012
             | 
            
                +0.10 / +1.69%
             |             
            
                6.00
             |           
            
                6.10
             |               
            
                5.90
             |                           
            
                6.00
             | 
            
                6.00
             |                     
            
                2.14
             |                                 
            
                254,040
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/29/2012
             | 
            
                -0.20 / -3.28%
             |             
            
                5.90
             |           
            
                6.10
             |               
            
                5.90
             |                           
            
                5.90
             | 
            
                5.90
             |                     
            
                2.11
             |                                 
            
                623,660
             |            
            
                 
             |                                       
         
    
        
            | 
                5/28/2012
             | 
            
                +0.20 / +3.39%
             |             
            
                6.10
             |           
            
                6.10
             |               
            
                5.90
             |                           
            
                6.10
             | 
            
                6.10
             |                     
            
                2.18
             |                                 
            
                1,143,720
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/25/2012
             | 
            
                +0.20 / +3.51%
             |             
            
                5.90
             |           
            
                5.90
             |               
            
                5.80
             |                           
            
                5.90
             | 
            
                5.90
             |                     
            
                2.11
             |                                 
            
                844,130
             |            
            
                 
             |                                       
         
    
        
            | 
                5/24/2012
             | 
            
                -0.30 / -5.00%
             |             
            
                5.80
             |           
            
                5.90
             |               
            
                5.70
             |                           
            
                5.70
             | 
            
                5.70
             |                     
            
                2.04
             |                                 
            
                1,028,760
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/23/2012
             | 
            
                -0.30 / -4.76%
             |             
            
                6.10
             |           
            
                6.10
             |               
            
                6.00
             |                           
            
                6.00
             | 
            
                6.00
             |                     
            
                2.14
             |                                 
            
                1,457,890
             |            
            
                 
             |                                       
         
    
        
            | 
                5/22/2012
             | 
            
                -0.20 / -3.08%
             |             
            
                6.50
             |           
            
                6.60
             |               
            
                6.20
             |                           
            
                6.30
             | 
            
                6.30
             |                     
            
                2.25
             |                                 
            
                956,530
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/21/2012
             | 
            
                +0.30 / +4.84%
             |             
            
                6.40
             |           
            
                6.50
             |               
            
                6.20
             |                           
            
                6.50
             | 
            
                6.50
             |                     
            
                2.32
             |                                 
            
                1,011,880
             |            
            
                 
             |                                       
         
    
        
            | 
                5/18/2012
             | 
            
                -0.30 / -4.62%
             |             
            
                6.40
             |           
            
                6.60
             |               
            
                6.20
             |                           
            
                6.20
             | 
            
                6.20
             |                     
            
                2.22
             |                                 
            
                1,414,330
             |  
            
                 
             |                                                              
             
    
         
    
    
 |