| 
                 
                    Closing price on 2/1/2013
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    4.60 | 
                 
                
                    | High | 
                    4.70 | 
                 
                
                    | Low | 
                    4.50 | 
                     
                
                    | Volume | 
                    379,160 | 
                                 
                
                    | Split-adjusted Price | 
                    1.68 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
PVT Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                2/1/2013
             | 
            
                +0.10 / +2.17%
             |             
            
                4.60
             |           
            
                4.70
             |               
            
                4.50
             |                           
            
                4.70
             | 
            
                4.70
             |                     
            
                1.68
             |                                 
            
                379,160
             |            
            
                 
             |                                       
         
    
        
            | 
                1/31/2013
             | 
            
                -0.20 / -4.17%
             |             
            
                4.80
             |           
            
                4.80
             |               
            
                4.60
             |                           
            
                4.60
             | 
            
                4.60
             |                     
            
                1.64
             |                                 
            
                351,690
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/30/2013
             | 
            
                0.00 / 0.00%
             |             
            
                4.80
             |           
            
                4.90
             |               
            
                4.70
             |                           
            
                4.80
             | 
            
                4.80
             |                     
            
                1.72
             |                                 
            
                513,360
             |            
            
                 
             |                                       
         
    
        
            | 
                1/29/2013
             | 
            
                +0.10 / +2.13%
             |             
            
                4.70
             |           
            
                4.80
             |               
            
                4.60
             |                           
            
                4.80
             | 
            
                4.80
             |                     
            
                1.72
             |                                 
            
                893,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/28/2013
             | 
            
                0.00 / 0.00%
             |             
            
                4.80
             |           
            
                4.90
             |               
            
                4.70
             |                           
            
                4.70
             | 
            
                4.70
             |                     
            
                1.68
             |                                 
            
                702,030
             |            
            
                 
             |                                       
         
    
        
            | 
                1/25/2013
             | 
            
                +0.10 / +2.17%
             |             
            
                4.70
             |           
            
                4.80
             |               
            
                4.60
             |                           
            
                4.70
             | 
            
                4.70
             |                     
            
                1.68
             |                                 
            
                527,160
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/24/2013
             | 
            
                +0.10 / +2.22%
             |             
            
                4.50
             |           
            
                4.70
             |               
            
                4.50
             |                           
            
                4.60
             | 
            
                4.60
             |                     
            
                1.64
             |                                 
            
                278,730
             |            
            
                 
             |                                       
         
    
        
            | 
                1/23/2013
             | 
            
                0.00 / 0.00%
             |             
            
                4.50
             |           
            
                4.60
             |               
            
                4.30
             |                           
            
                4.50
             | 
            
                4.50
             |                     
            
                1.61
             |                                 
            
                443,810
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/22/2013
             | 
            
                -0.20 / -4.26%
             |             
            
                4.70
             |           
            
                4.80
             |               
            
                4.50
             |                           
            
                4.50
             | 
            
                4.50
             |                     
            
                1.61
             |                                 
            
                804,720
             |            
            
                 
             |                                       
         
    
        
            | 
                1/21/2013
             | 
            
                -0.10 / -2.08%
             |             
            
                4.80
             |           
            
                4.90
             |               
            
                4.60
             |                           
            
                4.70
             | 
            
                4.70
             |                     
            
                1.68
             |                                 
            
                329,730
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/18/2013
             | 
            
                -0.30 / -5.88%
             |             
            
                4.90
             |           
            
                5.00
             |               
            
                4.80
             |                           
            
                4.80
             | 
            
                4.80
             |                     
            
                1.72
             |                                 
            
                1,730,420
             |            
            
                 
             |                                       
         
    
        
            | 
                1/17/2013
             | 
            
                +0.10 / +2.00%
             |             
            
                5.10
             |           
            
                5.30
             |               
            
                5.00
             |                           
            
                5.10
             | 
            
                5.10
             |                     
            
                1.82
             |                                 
            
                1,773,810
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/16/2013
             | 
            
                +0.30 / +6.38%
             |             
            
                5.00
             |           
            
                5.00
             |               
            
                4.90
             |                           
            
                5.00
             | 
            
                5.00
             |                     
            
                1.79
             |                                 
            
                1,358,750
             |            
            
                 
             |                                       
         
    
        
            | 
                1/15/2013
             | 
            
                +0.30 / +6.82%
             |             
            
                4.50
             |           
            
                4.70
             |               
            
                4.40
             |                           
            
                4.70
             | 
            
                4.70
             |                     
            
                1.68
             |                                 
            
                2,566,120
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/14/2013
             | 
            
                -0.10 / -2.22%
             |             
            
                4.50
             |           
            
                4.60
             |               
            
                4.40
             |                           
            
                4.40
             | 
            
                4.40
             |                     
            
                1.57
             |                                 
            
                420,310
             |            
            
                 
             |                                       
         
    
        
            | 
                1/11/2013
             | 
            
                -0.10 / -2.17%
             |             
            
                4.60
             |           
            
                4.60
             |               
            
                4.50
             |                           
            
                4.50
             | 
            
                4.50
             |                     
            
                1.61
             |                                 
            
                477,890
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/10/2013
             | 
            
                +0.20 / +4.55%
             |             
            
                4.30
             |           
            
                4.60
             |               
            
                4.30
             |                           
            
                4.60
             | 
            
                4.60
             |                     
            
                1.64
             |                                 
            
                465,460
             |            
            
                 
             |                                       
         
    
        
            | 
                1/9/2013
             | 
            
                -0.10 / -2.22%
             |             
            
                4.50
             |           
            
                4.70
             |               
            
                4.40
             |                           
            
                4.40
             | 
            
                4.40
             |                     
            
                1.57
             |                                 
            
                1,338,960
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/8/2013
             | 
            
                0.00 / 0.00%
             |             
            
                4.40
             |           
            
                4.60
             |               
            
                4.40
             |                           
            
                4.50
             | 
            
                4.50
             |                     
            
                1.61
             |                                 
            
                983,780
             |            
            
                 
             |                                       
         
    
        
            | 
                1/7/2013
             | 
            
                -0.10 / -2.17%
             |             
            
                4.60
             |           
            
                4.80
             |               
            
                4.50
             |                           
            
                4.50
             | 
            
                4.50
             |                     
            
                1.61
             |                                 
            
                660,360
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/4/2013
             | 
            
                +0.10 / +2.22%
             |             
            
                4.50
             |           
            
                4.70
             |               
            
                4.40
             |                           
            
                4.60
             | 
            
                4.60
             |                     
            
                1.64
             |                                 
            
                1,277,170
             |            
            
                 
             |                                       
         
    
        
            | 
                1/3/2013
             | 
            
                +0.20 / +4.65%
             |             
            
                4.50
             |           
            
                4.50
             |               
            
                4.40
             |                           
            
                4.50
             | 
            
                4.50
             |                     
            
                1.61
             |                                 
            
                1,949,080
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/2/2013
             | 
            
                +0.20 / +4.88%
             |             
            
                4.30
             |           
            
                4.30
             |               
            
                4.30
             |                           
            
                4.30
             | 
            
                4.30
             |                     
            
                1.54
             |                                 
            
                280,050
             |            
            
                 
             |                                       
         
    
        
            | 
                12/28/2012
             | 
            
                0.00 / 0.00%
             |             
            
                4.00
             |           
            
                4.10
             |               
            
                4.00
             |                           
            
                4.10
             | 
            
                4.10
             |                     
            
                1.47
             |                                 
            
                445,720
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/27/2012
             | 
            
                +0.10 / +2.50%
             |             
            
                4.00
             |           
            
                4.10
             |               
            
                3.90
             |                           
            
                4.10
             | 
            
                4.10
             |                     
            
                1.47
             |                                 
            
                389,810
             |            
            
                 
             |                                       
         
    
        
            | 
                12/26/2012
             | 
            
                +0.10 / +2.56%
             |             
            
                3.90
             |           
            
                4.00
             |               
            
                3.90
             |                           
            
                4.00
             | 
            
                4.00
             |                     
            
                1.43
             |                                 
            
                364,630
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/25/2012
             | 
            
                -0.10 / -2.50%
             |             
            
                4.00
             |           
            
                4.00
             |               
            
                3.90
             |                           
            
                3.90
             | 
            
                3.90
             |                     
            
                1.39
             |                                 
            
                264,470
             |            
            
                 
             |                                       
         
    
        
            | 
                12/24/2012
             | 
            
                0.00 / 0.00%
             |             
            
                3.90
             |           
            
                4.10
             |               
            
                3.90
             |                           
            
                4.00
             | 
            
                4.00
             |                     
            
                1.43
             |                                 
            
                114,330
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/21/2012
             | 
            
                +0.10 / +2.56%
             |             
            
                3.90
             |           
            
                4.00
             |               
            
                3.90
             |                           
            
                4.00
             | 
            
                4.00
             |                     
            
                1.43
             |                                 
            
                192,030
             |            
            
                 
             |                                       
         
    
        
            | 
                12/20/2012
             | 
            
                -0.10 / -2.50%
             |             
            
                4.10
             |           
            
                4.10
             |               
            
                3.90
             |                           
            
                3.90
             | 
            
                3.90
             |                     
            
                1.39
             |                                 
            
                127,020
             |  
            
                 
             |                                                              
             
    
         
    
    
 |