| 
                 
                    Closing price on 4/3/2013
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    29.50 | 
                 
                
                    | High | 
                    30.50 | 
                 
                
                    | Low | 
                    29.50 | 
                     
                
                    | Volume | 
                    3,510 | 
                                 
                
                    | Split-adjusted Price | 
                    4.45 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
ACC Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                4/3/2013
             | 
            
                +0.10 / +0.34%
             |             
            
                29.50
             |           
            
                30.50
             |               
            
                29.50
             |                           
            
                29.60
             | 
            
                29.60
             |                     
            
                4.45
             |                                 
            
                3,510
             |            
            
                 
             |                                       
         
    
        
            | 
                4/2/2013
             | 
            
                -0.90 / -2.96%
             |             
            
                30.20
             |           
            
                30.50
             |               
            
                29.50
             |                           
            
                29.50
             | 
            
                29.50
             |                     
            
                4.43
             |                                 
            
                8,520
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/1/2013
             | 
            
                -0.10 / -0.33%
             |             
            
                30.00
             |           
            
                31.00
             |               
            
                30.00
             |                           
            
                30.40
             | 
            
                30.40
             |                     
            
                4.57
             |                                 
            
                8,610
             |            
            
                 
             |                                       
         
    
        
            | 
                3/29/2013
             | 
            
                +0.50 / +1.67%
             |             
            
                30.50
             |           
            
                30.50
             |               
            
                30.00
             |                           
            
                30.50
             | 
            
                30.50
             |                     
            
                4.58
             |                                 
            
                9,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/28/2013
             | 
            
                -1.30 / -4.15%
             |             
            
                31.00
             |           
            
                31.10
             |               
            
                30.00
             |                           
            
                30.00
             | 
            
                30.00
             |                     
            
                4.51
             |                                 
            
                9,990
             |            
            
                 
             |                                       
         
    
        
            | 
                3/27/2013
             | 
            
                -0.60 / -1.88%
             |             
            
                31.50
             |           
            
                31.50
             |               
            
                31.00
             |                           
            
                31.30
             | 
            
                31.30
             |                     
            
                4.70
             |                                 
            
                2,160
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/26/2013
             | 
            
                +0.70 / +2.24%
             |             
            
                30.80
             |           
            
                31.90
             |               
            
                30.80
             |                           
            
                31.90
             | 
            
                31.90
             |                     
            
                4.79
             |                                 
            
                9,210
             |            
            
                 
             |                                       
         
    
        
            | 
                3/25/2013
             | 
            
                -1.30 / -4.00%
             |             
            
                32.30
             |           
            
                32.50
             |               
            
                31.20
             |                           
            
                31.20
             | 
            
                31.20
             |                     
            
                4.69
             |                                 
            
                3,830
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/22/2013
             | 
            
                -1.30 / -3.85%
             |             
            
                33.50
             |           
            
                33.50
             |               
            
                31.50
             |                           
            
                32.50
             | 
            
                32.50
             |                     
            
                4.88
             |                                 
            
                7,350
             |            
            
                 
             |                                       
         
    
        
            | 
                3/21/2013
             | 
            
                +0.10 / +0.30%
             |             
            
                33.70
             |           
            
                33.90
             |               
            
                32.50
             |                           
            
                33.80
             | 
            
                33.80
             |                     
            
                5.08
             |                                 
            
                19,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/20/2013
             | 
            
                0.00 / 0.00%
             |             
            
                34.00
             |           
            
                34.00
             |               
            
                33.00
             |                           
            
                33.70
             | 
            
                33.70
             |                     
            
                5.07
             |                                 
            
                11,030
             |            
            
                 
             |                                       
         
    
        
            | 
                3/19/2013
             | 
            
                +0.70 / +2.12%
             |             
            
                33.50
             |           
            
                33.80
             |               
            
                33.10
             |                           
            
                33.70
             | 
            
                33.70
             |                     
            
                5.07
             |                                 
            
                43,040
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/18/2013
             | 
            
                +1.00 / +3.13%
             |             
            
                32.50
             |           
            
                33.00
             |               
            
                32.00
             |                           
            
                33.00
             | 
            
                33.00
             |                     
            
                4.96
             |                                 
            
                58,340
             |            
            
                 
             |                                       
         
    
        
            | 
                3/15/2013
             | 
            
                +0.80 / +2.56%
             |             
            
                31.20
             |           
            
                32.30
             |               
            
                31.10
             |                           
            
                32.00
             | 
            
                32.00
             |                     
            
                4.81
             |                                 
            
                47,030
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/14/2013
             | 
            
                0.00 / 0.00%
             |             
            
                31.50
             |           
            
                31.50
             |               
            
                31.00
             |                           
            
                31.20
             | 
            
                31.20
             |                     
            
                4.69
             |                                 
            
                37,610
             |            
            
                 
             |                                       
         
    
        
            | 
                3/13/2013
             | 
            
                +0.70 / +2.30%
             |             
            
                30.70
             |           
            
                31.30
             |               
            
                30.60
             |                           
            
                31.20
             | 
            
                31.20
             |                     
            
                4.69
             |                                 
            
                45,720
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/12/2013
             | 
            
                +1.30 / +4.45%
             |             
            
                29.10
             |           
            
                30.50
             |               
            
                29.10
             |                           
            
                30.50
             | 
            
                30.50
             |                     
            
                4.58
             |                                 
            
                47,520
             |            
            
                 
             |                                       
         
    
        
            | 
                3/11/2013
             | 
            
                +0.50 / +1.74%
             |             
            
                28.70
             |           
            
                29.20
             |               
            
                28.50
             |                           
            
                29.20
             | 
            
                29.20
             |                     
            
                4.39
             |                                 
            
                8,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/8/2013
             | 
            
                +0.70 / +2.50%
             |             
            
                28.70
             |           
            
                28.70
             |               
            
                28.10
             |                           
            
                28.70
             | 
            
                28.70
             |                     
            
                4.31
             |                                 
            
                2,570
             |            
            
                 
             |                                       
         
    
        
            | 
                3/7/2013
             | 
            
                0.00 / 0.00%
             |             
            
                27.80
             |           
            
                28.00
             |               
            
                27.80
             |                           
            
                28.00
             | 
            
                28.00
             |                     
            
                4.21
             |                                 
            
                4,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/6/2013
             | 
            
                +0.80 / +2.94%
             |             
            
                27.30
             |           
            
                28.00
             |               
            
                27.30
             |                           
            
                28.00
             | 
            
                28.00
             |                     
            
                4.21
             |                                 
            
                5,000
             |            
            
                 
             |                                       
         
    
        
            | 
                3/5/2013
             | 
            
                0.00 / 0.00%
             |             
            
                27.10
             |           
            
                27.20
             |               
            
                27.10
             |                           
            
                27.20
             | 
            
                27.20
             |                     
            
                4.09
             |                                 
            
                16,270
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/4/2013
             | 
            
                +0.10 / +0.37%
             |             
            
                27.20
             |           
            
                27.50
             |               
            
                27.10
             |                           
            
                27.20
             | 
            
                27.20
             |                     
            
                4.09
             |                                 
            
                97,410
             |            
            
                 
             |                                       
         
    
        
            | 
                3/1/2013
             | 
            
                0.00 / 0.00%
             |             
            
                27.10
             |           
            
                27.10
             |               
            
                27.00
             |                           
            
                27.10
             | 
            
                27.10
             |                     
            
                4.07
             |                                 
            
                2,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/28/2013
             | 
            
                0.00 / 0.00%
             |             
            
                27.10
             |           
            
                27.10
             |               
            
                27.10
             |                           
            
                27.10
             | 
            
                27.10
             |                     
            
                4.07
             |                                 
            
                2,610
             |            
            
                 
             |                                       
         
    
        
            | 
                2/27/2013
             | 
            
                0.00 / 0.00%
             |             
            
                27.30
             |           
            
                27.30
             |               
            
                26.90
             |                           
            
                27.10
             | 
            
                27.10
             |                     
            
                4.07
             |                                 
            
                45,520
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/26/2013
             | 
            
                +0.30 / +1.12%
             |             
            
                26.80
             |           
            
                27.30
             |               
            
                26.80
             |                           
            
                27.10
             | 
            
                27.10
             |                     
            
                4.07
             |                                 
            
                40,600
             |            
            
                 
             |                                       
         
    
        
            | 
                2/25/2013
             | 
            
                +0.20 / +0.75%
             |             
            
                26.80
             |           
            
                26.80
             |               
            
                26.80
             |                           
            
                26.80
             | 
            
                26.80
             |                     
            
                4.03
             |                                 
            
                320
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/22/2013
             | 
            
                -0.30 / -1.12%
             |             
            
                26.50
             |           
            
                26.70
             |               
            
                26.50
             |                           
            
                26.60
             | 
            
                26.60
             |                     
            
                4.00
             |                                 
            
                15,560
             |            
            
                 
             |                                       
         
    
        
            | 
                2/21/2013
             | 
            
                -0.20 / -0.74%
             |             
            
                27.00
             |           
            
                27.20
             |               
            
                26.90
             |                           
            
                26.90
             | 
            
                26.90
             |                     
            
                4.04
             |                                 
            
                18,110
             |  
            
                 
             |                                                              
             
    
         
    
    
 |