| 
                 
                    Closing price on 4/19/2012
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    19.10 | 
                 
                
                    | High | 
                    19.20 | 
                 
                
                    | Low | 
                    17.70 | 
                     
                
                    | Volume | 
                    501,000 | 
                                 
                
                    | Split-adjusted Price | 
                    3.71 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
PPS Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                4/19/2012
             | 
            
                -1.10 / -5.79%
             |             
            
                19.10
             |           
            
                19.20
             |               
            
                17.70
             |                           
            
                17.90
             | 
            
                17.90
             |                     
            
                3.71
             |                                 
            
                501,000
             |            
            
                 
             |                                       
         
    
        
            | 
                4/18/2012
             | 
            
                -0.30 / -1.55%
             |             
            
                19.30
             |           
            
                19.40
             |               
            
                18.90
             |                           
            
                19.00
             | 
            
                19.00
             |                     
            
                3.93
             |                                 
            
                409,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/17/2012
             | 
            
                +0.40 / +2.12%
             |             
            
                18.90
             |           
            
                19.80
             |               
            
                18.90
             |                           
            
                19.30
             | 
            
                19.30
             |                     
            
                4.00
             |                                 
            
                429,100
             |            
            
                 
             |                                       
         
    
        
            | 
                4/16/2012
             | 
            
                +1.20 / +6.78%
             |             
            
                17.70
             |           
            
                18.90
             |               
            
                17.70
             |                           
            
                18.90
             | 
            
                18.90
             |                     
            
                3.91
             |                                 
            
                311,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/13/2012
             | 
            
                +0.40 / +2.31%
             |             
            
                17.20
             |           
            
                18.40
             |               
            
                16.90
             |                           
            
                17.70
             | 
            
                17.70
             |                     
            
                3.66
             |                                 
            
                526,670
             |            
            
                 
             |                                       
         
    
        
            | 
                4/12/2012
             | 
            
                +0.30 / +1.76%
             |             
            
                17.20
             |           
            
                17.70
             |               
            
                16.90
             |                           
            
                17.30
             | 
            
                17.30
             |                     
            
                3.58
             |                                 
            
                595,690
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/11/2012
             | 
            
                +0.30 / +1.80%
             |             
            
                16.80
             |           
            
                17.10
             |               
            
                16.70
             |                           
            
                17.00
             | 
            
                17.00
             |                     
            
                3.52
             |                                 
            
                422,100
             |            
            
                 
             |                                       
         
    
        
            | 
                4/10/2012
             | 
            
                -0.60 / -3.47%
             |             
            
                17.30
             |           
            
                17.40
             |               
            
                16.50
             |                           
            
                16.70
             | 
            
                16.70
             |                     
            
                3.46
             |                                 
            
                483,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/9/2012
             | 
            
                +0.80 / +4.85%
             |             
            
                16.70
             |           
            
                17.60
             |               
            
                16.60
             |                           
            
                17.30
             | 
            
                17.30
             |                     
            
                3.58
             |                                 
            
                443,700
             |            
            
                 
             |                                       
         
    
        
            | 
                4/6/2012
             | 
            
                0.00 / 0.00%
             |             
            
                16.80
             |           
            
                17.60
             |               
            
                16.50
             |                           
            
                16.50
             | 
            
                16.50
             |                     
            
                3.42
             |                                 
            
                660,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/5/2012
             | 
            
                +1.00 / +6.45%
             |             
            
                15.50
             |           
            
                16.50
             |               
            
                14.80
             |                           
            
                16.50
             | 
            
                16.50
             |                     
            
                3.42
             |                                 
            
                719,000
             |            
            
                 
             |                                       
         
    
        
            | 
                4/4/2012
             | 
            
                -1.10 / -6.63%
             |             
            
                16.60
             |           
            
                16.70
             |               
            
                15.50
             |                           
            
                15.50
             | 
            
                15.50
             |                     
            
                3.21
             |                                 
            
                487,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/3/2012
             | 
            
                +0.20 / +1.22%
             |             
            
                16.10
             |           
            
                17.00
             |               
            
                16.10
             |                           
            
                16.60
             | 
            
                16.60
             |                     
            
                3.44
             |                                 
            
                324,500
             |            
            
                 
             |                                       
         
    
        
            | 
                3/30/2012
             | 
            
                -1.00 / -5.75%
             |             
            
                17.50
             |           
            
                17.60
             |               
            
                16.40
             |                           
            
                16.40
             | 
            
                16.40
             |                     
            
                3.40
             |                                 
            
                441,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/29/2012
             | 
            
                +0.20 / +1.16%
             |             
            
                17.20
             |           
            
                18.40
             |               
            
                16.90
             |                           
            
                17.40
             | 
            
                17.40
             |                     
            
                3.60
             |                                 
            
                870,200
             |            
            
                 
             |                                       
         
    
        
            | 
                3/28/2012
             | 
            
                +1.10 / +6.83%
             |             
            
                15.50
             |           
            
                17.20
             |               
            
                15.00
             |                           
            
                17.20
             | 
            
                17.20
             |                     
            
                3.56
             |                                 
            
                769,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/27/2012
             | 
            
                -0.80 / -4.73%
             |             
            
                17.00
             |           
            
                17.10
             |               
            
                16.10
             |                           
            
                16.10
             | 
            
                16.10
             |                     
            
                3.33
             |                                 
            
                537,200
             |            
            
                 
             |                                       
         
    
        
            | 
                3/26/2012
             | 
            
                +0.70 / +4.32%
             |             
            
                15.90
             |           
            
                16.90
             |               
            
                15.90
             |                           
            
                16.90
             | 
            
                16.90
             |                     
            
                3.50
             |                                 
            
                338,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/23/2012
             | 
            
                +1.00 / +6.58%
             |             
            
                15.20
             |           
            
                16.20
             |               
            
                15.20
             |                           
            
                16.20
             | 
            
                16.20
             |                     
            
                3.35
             |                                 
            
                574,800
             |            
            
                 
             |                                       
         
    
        
            | 
                3/22/2012
             | 
            
                -0.10 / -0.65%
             |             
            
                15.20
             |           
            
                15.80
             |               
            
                14.80
             |                           
            
                15.20
             | 
            
                15.20
             |                     
            
                3.15
             |                                 
            
                665,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/21/2012
             | 
            
                +0.80 / +5.52%
             |             
            
                14.60
             |           
            
                15.30
             |               
            
                14.40
             |                           
            
                15.30
             | 
            
                15.30
             |                     
            
                3.17
             |                                 
            
                468,400
             |            
            
                 
             |                                       
         
    
        
            | 
                3/20/2012
             | 
            
                +0.60 / +4.32%
             |             
            
                14.30
             |           
            
                14.50
             |               
            
                13.90
             |                           
            
                14.50
             | 
            
                14.50
             |                     
            
                3.00
             |                                 
            
                412,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/19/2012
             | 
            
                +0.90 / +6.92%
             |             
            
                13.30
             |           
            
                13.90
             |               
            
                13.20
             |                           
            
                13.90
             | 
            
                13.90
             |                     
            
                2.88
             |                                 
            
                273,800
             |            
            
                 
             |                                       
         
    
        
            | 
                3/16/2012
             | 
            
                -0.20 / -1.52%
             |             
            
                12.60
             |           
            
                13.10
             |               
            
                12.40
             |                           
            
                13.00
             | 
            
                13.00
             |                     
            
                2.69
             |                                 
            
                460,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/15/2012
             | 
            
                +0.80 / +6.45%
             |             
            
                12.50
             |           
            
                13.30
             |               
            
                11.80
             |                           
            
                13.20
             | 
            
                13.20
             |                     
            
                2.73
             |                                 
            
                722,900
             |            
            
                 
             |                                       
         
    
        
            | 
                3/14/2012
             | 
            
                -0.30 / -2.36%
             |             
            
                12.70
             |           
            
                12.90
             |               
            
                12.40
             |                           
            
                12.40
             | 
            
                12.40
             |                     
            
                2.57
             |                                 
            
                278,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/13/2012
             | 
            
                +0.40 / +3.25%
             |             
            
                12.40
             |           
            
                12.70
             |               
            
                12.40
             |                           
            
                12.70
             | 
            
                12.70
             |                     
            
                2.63
             |                                 
            
                208,800
             |            
            
                 
             |                                       
         
    
        
            | 
                3/12/2012
             | 
            
                +0.50 / +4.24%
             |             
            
                12.00
             |           
            
                12.40
             |               
            
                12.00
             |                           
            
                12.30
             | 
            
                12.30
             |                     
            
                2.55
             |                                 
            
                133,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/9/2012
             | 
            
                -0.40 / -3.28%
             |             
            
                12.00
             |           
            
                12.30
             |               
            
                11.70
             |                           
            
                11.80
             | 
            
                11.80
             |                     
            
                2.44
             |                                 
            
                235,500
             |            
            
                 
             |                                       
         
    
        
            | 
                3/8/2012
             | 
            
                -0.70 / -5.43%
             |             
            
                12.00
             |           
            
                12.50
             |               
            
                12.00
             |                           
            
                12.20
             | 
            
                12.20
             |                     
            
                2.53
             |                                 
            
                237,700
             |  
            
                 
             |                                                              
             
    
         
    
    
 |