| 
                 
                    Closing price on 3/21/2013
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    4.70 | 
                 
                
                    | High | 
                    4.70 | 
                 
                
                    | Low | 
                    4.60 | 
                     
                
                    | Volume | 
                    289,850 | 
                                 
                
                    | Split-adjusted Price | 
                    1.64 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
PVT Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                3/21/2013
             | 
            
                -0.10 / -2.13%
             |             
            
                4.70
             |           
            
                4.70
             |               
            
                4.60
             |                           
            
                4.60
             | 
            
                4.60
             |                     
            
                1.64
             |                                 
            
                289,850
             |            
            
                 
             |                                       
         
    
        
            | 
                3/20/2013
             | 
            
                +0.10 / +2.17%
             |             
            
                4.60
             |           
            
                4.80
             |               
            
                4.60
             |                           
            
                4.70
             | 
            
                4.70
             |                     
            
                1.68
             |                                 
            
                267,570
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/19/2013
             | 
            
                -0.10 / -2.13%
             |             
            
                4.60
             |           
            
                4.70
             |               
            
                4.60
             |                           
            
                4.60
             | 
            
                4.60
             |                     
            
                1.64
             |                                 
            
                148,960
             |            
            
                 
             |                                       
         
    
        
            | 
                3/18/2013
             | 
            
                0.00 / 0.00%
             |             
            
                4.70
             |           
            
                4.80
             |               
            
                4.60
             |                           
            
                4.70
             | 
            
                4.70
             |                     
            
                1.68
             |                                 
            
                661,320
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/15/2013
             | 
            
                0.00 / 0.00%
             |             
            
                4.70
             |           
            
                4.80
             |               
            
                4.60
             |                           
            
                4.70
             | 
            
                4.70
             |                     
            
                1.68
             |                                 
            
                190,340
             |            
            
                 
             |                                       
         
    
        
            | 
                3/14/2013
             | 
            
                0.00 / 0.00%
             |             
            
                4.70
             |           
            
                4.80
             |               
            
                4.60
             |                           
            
                4.70
             | 
            
                4.70
             |                     
            
                1.68
             |                                 
            
                626,670
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/13/2013
             | 
            
                0.00 / 0.00%
             |             
            
                4.70
             |           
            
                4.80
             |               
            
                4.60
             |                           
            
                4.70
             | 
            
                4.70
             |                     
            
                1.68
             |                                 
            
                682,620
             |            
            
                 
             |                                       
         
    
        
            | 
                3/12/2013
             | 
            
                -0.10 / -2.08%
             |             
            
                4.70
             |           
            
                4.90
             |               
            
                4.60
             |                           
            
                4.70
             | 
            
                4.70
             |                     
            
                1.68
             |                                 
            
                510,220
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/11/2013
             | 
            
                +0.20 / +4.35%
             |             
            
                4.70
             |           
            
                4.90
             |               
            
                4.60
             |                           
            
                4.80
             | 
            
                4.80
             |                     
            
                1.72
             |                                 
            
                552,260
             |            
            
                 
             |                                       
         
    
        
            | 
                3/8/2013
             | 
            
                +0.10 / +2.22%
             |             
            
                4.50
             |           
            
                4.70
             |               
            
                4.50
             |                           
            
                4.60
             | 
            
                4.60
             |                     
            
                1.64
             |                                 
            
                240,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/7/2013
             | 
            
                -0.20 / -4.26%
             |             
            
                4.70
             |           
            
                4.70
             |               
            
                4.40
             |                           
            
                4.50
             | 
            
                4.50
             |                     
            
                1.61
             |                                 
            
                823,300
             |            
            
                 
             |                                       
         
    
        
            | 
                3/6/2013
             | 
            
                +0.20 / +4.44%
             |             
            
                4.60
             |           
            
                4.70
             |               
            
                4.50
             |                           
            
                4.70
             | 
            
                4.70
             |                     
            
                1.68
             |                                 
            
                612,120
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/5/2013
             | 
            
                -0.20 / -4.26%
             |             
            
                4.60
             |           
            
                4.70
             |               
            
                4.40
             |                           
            
                4.50
             | 
            
                4.50
             |                     
            
                1.61
             |                                 
            
                572,340
             |            
            
                 
             |                                       
         
    
        
            | 
                3/4/2013
             | 
            
                -0.30 / -6.00%
             |             
            
                5.00
             |           
            
                5.00
             |               
            
                4.70
             |                           
            
                4.70
             | 
            
                4.70
             |                     
            
                1.68
             |                                 
            
                1,072,260
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/1/2013
             | 
            
                +0.20 / +4.17%
             |             
            
                4.80
             |           
            
                5.10
             |               
            
                4.70
             |                           
            
                5.00
             | 
            
                5.00
             |                     
            
                1.79
             |                                 
            
                2,881,490
             |            
            
                 
             |                                       
         
    
        
            | 
                2/28/2013
             | 
            
                +0.10 / +2.13%
             |             
            
                4.80
             |           
            
                4.90
             |               
            
                4.70
             |                           
            
                4.80
             | 
            
                4.80
             |                     
            
                1.72
             |                                 
            
                765,690
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/27/2013
             | 
            
                0.00 / 0.00%
             |             
            
                4.70
             |           
            
                4.80
             |               
            
                4.60
             |                           
            
                4.70
             | 
            
                4.70
             |                     
            
                1.68
             |                                 
            
                717,680
             |            
            
                 
             |                                       
         
    
        
            | 
                2/26/2013
             | 
            
                -0.20 / -4.08%
             |             
            
                4.90
             |           
            
                5.10
             |               
            
                4.70
             |                           
            
                4.70
             | 
            
                4.70
             |                     
            
                1.68
             |                                 
            
                1,322,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/25/2013
             | 
            
                -0.10 / -2.00%
             |             
            
                5.00
             |           
            
                5.10
             |               
            
                4.90
             |                           
            
                4.90
             | 
            
                4.90
             |                     
            
                1.75
             |                                 
            
                398,990
             |            
            
                 
             |                                       
         
    
        
            | 
                2/22/2013
             | 
            
                -0.10 / -1.96%
             |             
            
                5.10
             |           
            
                5.30
             |               
            
                4.80
             |                           
            
                5.00
             | 
            
                5.00
             |                     
            
                1.79
             |                                 
            
                1,378,720
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/21/2013
             | 
            
                -0.30 / -5.56%
             |             
            
                5.40
             |           
            
                5.50
             |               
            
                5.10
             |                           
            
                5.10
             | 
            
                5.10
             |                     
            
                1.82
             |                                 
            
                1,960,590
             |            
            
                 
             |                                       
         
    
        
            | 
                2/20/2013
             | 
            
                +0.10 / +1.89%
             |             
            
                5.20
             |           
            
                5.50
             |               
            
                5.10
             |                           
            
                5.40
             | 
            
                5.40
             |                     
            
                1.93
             |                                 
            
                856,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/19/2013
             | 
            
                -0.20 / -3.64%
             |             
            
                5.40
             |           
            
                5.50
             |               
            
                5.20
             |                           
            
                5.30
             | 
            
                5.30
             |                     
            
                1.89
             |                                 
            
                2,172,530
             |            
            
                 
             |                                       
         
    
        
            | 
                2/18/2013
             | 
            
                +0.20 / +3.77%
             |             
            
                5.50
             |           
            
                5.60
             |               
            
                5.20
             |                           
            
                5.50
             | 
            
                5.50
             |                     
            
                1.97
             |                                 
            
                1,439,310
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/8/2013
             | 
            
                +0.30 / +6.00%
             |             
            
                5.20
             |           
            
                5.30
             |               
            
                5.10
             |                           
            
                5.30
             | 
            
                5.30
             |                     
            
                1.89
             |                                 
            
                1,985,370
             |            
            
                 
             |                                       
         
    
        
            | 
                2/7/2013
             | 
            
                +0.30 / +6.38%
             |             
            
                4.80
             |           
            
                5.00
             |               
            
                4.80
             |                           
            
                5.00
             | 
            
                5.00
             |                     
            
                1.79
             |                                 
            
                2,952,330
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/6/2013
             | 
            
                +0.20 / +4.44%
             |             
            
                4.50
             |           
            
                4.70
             |               
            
                4.50
             |                           
            
                4.70
             | 
            
                4.70
             |                     
            
                1.68
             |                                 
            
                953,110
             |            
            
                 
             |                                       
         
    
        
            | 
                2/5/2013
             | 
            
                -0.10 / -2.17%
             |             
            
                4.60
             |           
            
                4.60
             |               
            
                4.50
             |                           
            
                4.50
             | 
            
                4.50
             |                     
            
                1.61
             |                                 
            
                480,550
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/4/2013
             | 
            
                -0.10 / -2.13%
             |             
            
                4.70
             |           
            
                4.80
             |               
            
                4.60
             |                           
            
                4.60
             | 
            
                4.60
             |                     
            
                1.64
             |                                 
            
                193,930
             |            
            
                 
             |                                       
         
    
        
            | 
                2/1/2013
             | 
            
                +0.10 / +2.17%
             |             
            
                4.60
             |           
            
                4.70
             |               
            
                4.50
             |                           
            
                4.70
             | 
            
                4.70
             |                     
            
                1.68
             |                                 
            
                379,160
             |  
            
                 
             |                                                              
             
    
         
    
    
 |