| 
                 
                    Closing price on 2/19/2013
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    26.90 | 
                 
                
                    | High | 
                    27.90 | 
                 
                
                    | Low | 
                    26.90 | 
                     
                
                    | Volume | 
                    8,770 | 
                                 
                
                    | Split-adjusted Price | 
                    4.06 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
ACC Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                2/19/2013
             | 
            
                -0.80 / -2.88%
             |             
            
                26.90
             |           
            
                27.90
             |               
            
                26.90
             |                           
            
                27.00
             | 
            
                27.00
             |                     
            
                4.06
             |                                 
            
                8,770
             |            
            
                 
             |                                       
         
    
        
            | 
                2/18/2013
             | 
            
                +0.30 / +1.09%
             |             
            
                27.80
             |           
            
                27.80
             |               
            
                27.80
             |                           
            
                27.80
             | 
            
                27.80
             |                     
            
                4.18
             |                                 
            
                200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/8/2013
             | 
            
                +0.10 / +0.36%
             |             
            
                27.20
             |           
            
                27.50
             |               
            
                26.70
             |                           
            
                27.50
             | 
            
                27.50
             |                     
            
                4.13
             |                                 
            
                790
             |            
            
                 
             |                                       
         
    
        
            | 
                2/7/2013
             | 
            
                0.00 / 0.00%
             |             
            
                27.40
             |           
            
                27.40
             |               
            
                27.40
             |                           
            
                27.40
             | 
            
                27.40
             |                     
            
                4.12
             |                                 
            
                0
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/6/2013
             | 
            
                +0.90 / +3.40%
             |             
            
                26.50
             |           
            
                27.40
             |               
            
                26.50
             |                           
            
                27.40
             | 
            
                27.40
             |                     
            
                4.12
             |                                 
            
                10,010
             |            
            
                 
             |                                       
         
    
        
            | 
                2/5/2013
             | 
            
                -0.10 / -0.38%
             |             
            
                26.50
             |           
            
                26.50
             |               
            
                26.50
             |                           
            
                26.50
             | 
            
                26.50
             |                     
            
                3.98
             |                                 
            
                5,720
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/4/2013
             | 
            
                -0.70 / -2.56%
             |             
            
                26.60
             |           
            
                26.60
             |               
            
                26.60
             |                           
            
                26.60
             | 
            
                26.60
             |                     
            
                4.00
             |                                 
            
                10,680
             |            
            
                 
             |                                       
         
    
        
            | 
                2/1/2013
             | 
            
                -0.20 / -0.73%
             |             
            
                26.70
             |           
            
                27.30
             |               
            
                26.60
             |                           
            
                27.30
             | 
            
                27.30
             |                     
            
                4.10
             |                                 
            
                3,010
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/31/2013
             | 
            
                -0.30 / -1.08%
             |             
            
                26.80
             |           
            
                27.50
             |               
            
                26.80
             |                           
            
                27.50
             | 
            
                27.50
             |                     
            
                4.13
             |                                 
            
                800
             |            
            
                 
             |                                       
         
    
        
            | 
                1/30/2013
             | 
            
                +0.90 / +3.35%
             |             
            
                26.60
             |           
            
                27.80
             |               
            
                26.60
             |                           
            
                27.80
             | 
            
                27.80
             |                     
            
                4.18
             |                                 
            
                1,090
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/29/2013
             | 
            
                +0.10 / +0.37%
             |             
            
                27.90
             |           
            
                27.90
             |               
            
                26.80
             |                           
            
                26.90
             | 
            
                26.90
             |                     
            
                4.04
             |                                 
            
                250
             |            
            
                 
             |                                       
         
    
        
            | 
                1/28/2013
             | 
            
                +0.30 / +1.13%
             |             
            
                26.50
             |           
            
                27.00
             |               
            
                26.50
             |                           
            
                26.80
             | 
            
                26.80
             |                     
            
                4.03
             |                                 
            
                1,970
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/25/2013
             | 
            
                +0.10 / +0.38%
             |             
            
                26.20
             |           
            
                26.50
             |               
            
                26.00
             |                           
            
                26.50
             | 
            
                26.50
             |                     
            
                3.98
             |                                 
            
                7,410
             |            
            
                 
             |                                       
         
    
        
            | 
                1/24/2013
             | 
            
                +0.40 / +1.54%
             |             
            
                26.00
             |           
            
                26.40
             |               
            
                26.00
             |                           
            
                26.40
             | 
            
                26.40
             |                     
            
                3.97
             |                                 
            
                6,380
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/23/2013
             | 
            
                -0.70 / -2.62%
             |             
            
                26.00
             |           
            
                26.00
             |               
            
                26.00
             |                           
            
                26.00
             | 
            
                26.00
             |                     
            
                3.91
             |                                 
            
                7,170
             |            
            
                 
             |                                       
         
    
        
            | 
                1/22/2013
             | 
            
                -1.00 / -3.61%
             |             
            
                26.60
             |           
            
                26.70
             |               
            
                26.00
             |                           
            
                26.70
             | 
            
                26.70
             |                     
            
                4.01
             |                                 
            
                5,340
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/21/2013
             | 
            
                +1.10 / +4.14%
             |             
            
                26.50
             |           
            
                27.70
             |               
            
                26.50
             |                           
            
                27.70
             | 
            
                27.70
             |                     
            
                4.16
             |                                 
            
                48,330
             |            
            
                 
             |                                       
         
    
        
            | 
                1/18/2013
             | 
            
                -0.30 / -1.12%
             |             
            
                26.50
             |           
            
                26.70
             |               
            
                26.50
             |                           
            
                26.60
             | 
            
                26.60
             |                     
            
                4.00
             |                                 
            
                3,260
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/17/2013
             | 
            
                +0.40 / +1.51%
             |             
            
                26.50
             |           
            
                27.00
             |               
            
                26.50
             |                           
            
                26.90
             | 
            
                26.90
             |                     
            
                4.04
             |                                 
            
                138,620
             |            
            
                 
             |                                       
         
    
        
            | 
                1/16/2013
             | 
            
                +0.30 / +1.15%
             |             
            
                26.50
             |           
            
                27.00
             |               
            
                26.40
             |                           
            
                26.50
             | 
            
                26.50
             |                     
            
                3.98
             |                                 
            
                15,350
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/15/2013
             | 
            
                0.00 / 0.00%
             |             
            
                26.20
             |           
            
                26.30
             |               
            
                26.20
             |                           
            
                26.20
             | 
            
                26.20
             |                     
            
                3.94
             |                                 
            
                26,560
             |            
            
                 
             |                                       
         
    
        
            | 
                1/14/2013
             | 
            
                -0.80 / -2.96%
             |             
            
                26.00
             |           
            
                26.20
             |               
            
                26.00
             |                           
            
                26.20
             | 
            
                26.20
             |                     
            
                3.94
             |                                 
            
                5,810
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/11/2013
             | 
            
                +0.70 / +2.66%
             |             
            
                27.00
             |           
            
                27.00
             |               
            
                27.00
             |                           
            
                27.00
             | 
            
                27.00
             |                     
            
                4.06
             |                                 
            
                50
             |            
            
                 
             |                                       
         
    
        
            | 
                1/10/2013
             | 
            
                +0.30 / +1.15%
             |             
            
                26.00
             |           
            
                26.30
             |               
            
                25.90
             |                           
            
                26.30
             | 
            
                26.30
             |                     
            
                3.95
             |                                 
            
                6,470
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/9/2013
             | 
            
                0.00 / 0.00%
             |             
            
                26.50
             |           
            
                26.50
             |               
            
                26.00
             |                           
            
                26.00
             | 
            
                26.00
             |                     
            
                3.91
             |                                 
            
                17,960
             |            
            
                 
             |                                       
         
    
        
            | 
                1/8/2013
             | 
            
                +0.50 / +1.96%
             |             
            
                25.50
             |           
            
                26.00
             |               
            
                25.50
             |                           
            
                26.00
             | 
            
                26.00
             |                     
            
                3.91
             |                                 
            
                2,170
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/7/2013
             | 
            
                -0.10 / -0.39%
             |             
            
                25.50
             |           
            
                26.50
             |               
            
                25.50
             |                           
            
                25.50
             | 
            
                25.50
             |                     
            
                3.83
             |                                 
            
                6,340
             |            
            
                 
             |                                       
         
    
        
            | 
                1/4/2013
             | 
            
                -0.10 / -0.39%
             |             
            
                25.60
             |           
            
                25.60
             |               
            
                25.40
             |                           
            
                25.60
             | 
            
                25.60
             |                     
            
                3.85
             |                                 
            
                12,840
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/3/2013
             | 
            
                0.00 / 0.00%
             |             
            
                25.70
             |           
            
                25.80
             |               
            
                25.40
             |                           
            
                25.70
             | 
            
                25.70
             |                     
            
                3.86
             |                                 
            
                7,410
             |            
            
                 
             |                                       
         
    
        
            | 
                1/2/2013
             | 
            
                0.00 / 0.00%
             |             
            
                25.70
             |           
            
                25.70
             |               
            
                25.70
             |                           
            
                25.70
             | 
            
                25.70
             |                     
            
                3.86
             |                                 
            
                570
             |  
            
                 
             |                                                              
             
    
         
    
    
 |