| 
                 
                    Closing price on 6/25/2012
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    19.10 | 
                 
                
                    | High | 
                    19.60 | 
                 
                
                    | Low | 
                    19.10 | 
                     
                
                    | Volume | 
                    1,000 | 
                                 
                
                    | Split-adjusted Price | 
                    2.50 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
NBC Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                6/25/2012
             | 
            
                -0.70 / -3.47%
             |             
            
                19.10
             |           
            
                19.60
             |               
            
                19.10
             |                           
            
                19.50
             | 
            
                19.19
             |                     
            
                2.50
             |                                 
            
                1,000
             |            
            
                 
             |                                       
         
    
        
            | 
                6/22/2012
             | 
            
                +0.20 / +1.00%
             |             
            
                19.40
             |           
            
                20.20
             |               
            
                19.40
             |                           
            
                20.20
             | 
            
                19.96
             |                     
            
                2.59
             |                                 
            
                500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/21/2012
             | 
            
                -0.30 / -1.48%
             |             
            
                20.50
             |           
            
                20.50
             |               
            
                20.00
             |                           
            
                20.00
             | 
            
                20.12
             |                     
            
                2.57
             |                                 
            
                8,200
             |            
            
                 
             |                                       
         
    
        
            | 
                6/20/2012
             | 
            
                +0.50 / +2.53%
             |             
            
                20.30
             |           
            
                20.30
             |               
            
                20.10
             |                           
            
                20.30
             | 
            
                20.23
             |                     
            
                2.60
             |                                 
            
                4,340
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/19/2012
             | 
            
                -0.60 / -2.94%
             |             
            
                19.70
             |           
            
                19.80
             |               
            
                19.70
             |                           
            
                19.80
             | 
            
                19.75
             |                     
            
                2.54
             |                                 
            
                6,000
             |            
            
                 
             |                                       
         
    
        
            | 
                6/18/2012
             | 
            
                +0.90 / +4.62%
             |             
            
                19.50
             |           
            
                20.50
             |               
            
                19.50
             |                           
            
                20.40
             | 
            
                20.36
             |                     
            
                2.62
             |                                 
            
                21,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/15/2012
             | 
            
                +0.60 / +3.17%
             |             
            
                19.00
             |           
            
                19.50
             |               
            
                19.00
             |                           
            
                19.50
             | 
            
                19.34
             |                     
            
                2.50
             |                                 
            
                11,400
             |            
            
                 
             |                                       
         
    
        
            | 
                6/14/2012
             | 
            
                -0.10 / -0.53%
             |             
            
                19.00
             |           
            
                19.00
             |               
            
                18.10
             |                           
            
                18.90
             | 
            
                18.65
             |                     
            
                2.42
             |                                 
            
                5,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/13/2012
             | 
            
                -0.30 / -1.55%
             |             
            
                19.20
             |           
            
                19.20
             |               
            
                18.80
             |                           
            
                19.00
             | 
            
                18.91
             |                     
            
                2.44
             |                                 
            
                2,300
             |            
            
                 
             |                                       
         
    
        
            | 
                6/12/2012
             | 
            
                -0.40 / -2.03%
             |             
            
                19.10
             |           
            
                19.30
             |               
            
                18.90
             |                           
            
                19.30
             | 
            
                18.96
             |                     
            
                2.48
             |                                 
            
                7,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/11/2012
             | 
            
                0.00 / 0.00%
             |             
            
                19.70
             |           
            
                19.70
             |               
            
                19.70
             |                           
            
                19.70
             | 
            
                19.70
             |                     
            
                2.53
             |                                 
            
                0
             |            
            
                 
             |                                       
         
    
        
            | 
                6/8/2012
             | 
            
                +0.30 / +1.55%
             |             
            
                19.60
             |           
            
                19.70
             |               
            
                19.20
             |                           
            
                19.70
             | 
            
                19.45
             |                     
            
                2.53
             |                                 
            
                8,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/7/2012
             | 
            
                0.00 / 0.00%
             |             
            
                19.70
             |           
            
                19.90
             |               
            
                19.40
             |                           
            
                19.40
             | 
            
                19.61
             |                     
            
                2.49
             |                                 
            
                8,900
             |            
            
                 
             |                                       
         
    
        
            | 
                6/6/2012
             | 
            
                0.00 / 0.00%
             |             
            
                19.20
             |           
            
                19.40
             |               
            
                19.00
             |                           
            
                19.40
             | 
            
                19.09
             |                     
            
                2.49
             |                                 
            
                7,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/5/2012
             | 
            
                +0.40 / +2.11%
             |             
            
                19.00
             |           
            
                19.50
             |               
            
                19.00
             |                           
            
                19.40
             | 
            
                19.35
             |                     
            
                2.49
             |                                 
            
                8,400
             |            
            
                 
             |                                       
         
    
        
            | 
                6/4/2012
             | 
            
                -0.90 / -4.52%
             |             
            
                19.60
             |           
            
                19.70
             |               
            
                18.70
             |                           
            
                19.00
             | 
            
                18.92
             |                     
            
                2.44
             |                                 
            
                9,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/1/2012
             | 
            
                +0.80 / +4.19%
             |             
            
                20.00
             |           
            
                20.00
             |               
            
                19.40
             |                           
            
                19.90
             | 
            
                19.81
             |                     
            
                2.55
             |                                 
            
                4,600
             |            
            
                 
             |                                       
         
    
        
            | 
                5/31/2012
             | 
            
                -0.70 / -3.54%
             |             
            
                19.80
             |           
            
                21.00
             |               
            
                19.00
             |                           
            
                19.10
             | 
            
                19.43
             |                     
            
                2.45
             |                                 
            
                17,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/30/2012
             | 
            
                0.00 / 0.00%
             |             
            
                19.80
             |           
            
                19.80
             |               
            
                19.80
             |                           
            
                19.80
             | 
            
                19.80
             |                     
            
                2.54
             |                                 
            
                0
             |            
            
                 
             |                                       
         
    
        
            | 
                5/29/2012
             | 
            
                -0.20 / -1.00%
             |             
            
                19.20
             |           
            
                19.80
             |               
            
                19.20
             |                           
            
                19.80
             | 
            
                19.30
             |                     
            
                2.54
             |                                 
            
                1,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/28/2012
             | 
            
                +0.10 / +0.50%
             |             
            
                20.00
             |           
            
                20.00
             |               
            
                19.50
             |                           
            
                20.00
             | 
            
                19.81
             |                     
            
                2.57
             |                                 
            
                3,100
             |            
            
                 
             |                                       
         
    
        
            | 
                5/25/2012
             | 
            
                +0.90 / +4.74%
             |             
            
                19.00
             |           
            
                19.90
             |               
            
                19.00
             |                           
            
                19.90
             | 
            
                19.75
             |                     
            
                2.55
             |                                 
            
                10,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/24/2012
             | 
            
                -0.20 / -1.04%
             |             
            
                18.30
             |           
            
                19.00
             |               
            
                18.30
             |                           
            
                19.00
             | 
            
                18.55
             |                     
            
                2.44
             |                                 
            
                11,900
             |            
            
                 
             |                                       
         
    
        
            | 
                5/23/2012
             | 
            
                -1.80 / -8.57%
             |             
            
                19.50
             |           
            
                19.50
             |               
            
                19.20
             |                           
            
                19.20
             | 
            
                19.38
             |                     
            
                2.46
             |                                 
            
                47,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/22/2012
             | 
            
                +1.00 / +5.00%
             |             
            
                19.80
             |           
            
                21.00
             |               
            
                19.70
             |                           
            
                21.00
             | 
            
                19.96
             |                     
            
                2.69
             |                                 
            
                4,700
             |            
            
                 
             |                                       
         
    
        
            | 
                5/21/2012
             | 
            
                +1.30 / +6.95%
             |             
            
                19.80
             |           
            
                20.00
             |               
            
                19.40
             |                           
            
                20.00
             | 
            
                19.87
             |                     
            
                2.57
             |                                 
            
                2,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/18/2012
             | 
            
                -1.00 / -5.08%
             |             
            
                18.70
             |           
            
                19.00
             |               
            
                18.70
             |                           
            
                18.70
             | 
            
                18.72
             |                     
            
                2.40
             |                                 
            
                19,000
             |            
            
                 
             |                                       
         
    
        
            | 
                5/17/2012
             | 
            
                -0.10 / -0.51%
             |             
            
                19.90
             |           
            
                20.10
             |               
            
                19.70
             |                           
            
                19.70
             | 
            
                19.93
             |                     
            
                2.53
             |                                 
            
                5,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/16/2012
             | 
            
                +0.70 / +3.66%
             |             
            
                19.30
             |           
            
                20.00
             |               
            
                19.20
             |                           
            
                19.80
             | 
            
                19.36
             |                     
            
                2.54
             |                                 
            
                8,500
             |            
            
                 
             |                                       
         
    
        
            | 
                5/15/2012
             | 
            
                -1.30 / -6.37%
             |             
            
                20.40
             |           
            
                20.40
             |               
            
                19.00
             |                           
            
                19.10
             | 
            
                19.27
             |                     
            
                2.45
             |                                 
            
                140,800
             |  
            
                 
             |                                                              
             
    
         
    
    
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