| 
                 
                    Closing price on 3/12/2013
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    6.40 | 
                 
                
                    | High | 
                    6.40 | 
                 
                
                    | Low | 
                    6.40 | 
                     
                
                    | Volume | 
                    7,200 | 
                                 
                
                    | Split-adjusted Price | 
                    4.68 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
XMC Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                3/12/2013
             | 
            
                0.00 / 0.00%
             |             
            
                6.40
             |           
            
                6.40
             |               
            
                6.40
             |                           
            
                6.40
             | 
            
                6.40
             |                     
            
                4.68
             |                                 
            
                7,200
             |            
            
                 
             |                                       
         
    
        
            | 
                3/11/2013
             | 
            
                0.00 / 0.00%
             |             
            
                6.40
             |           
            
                6.40
             |               
            
                6.30
             |                           
            
                6.40
             | 
            
                6.39
             |                     
            
                4.68
             |                                 
            
                5,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/8/2013
             | 
            
                +0.10 / +1.59%
             |             
            
                6.40
             |           
            
                6.40
             |               
            
                6.40
             |                           
            
                6.40
             | 
            
                6.40
             |                     
            
                4.68
             |                                 
            
                3,000
             |            
            
                 
             |                                       
         
    
        
            | 
                3/7/2013
             | 
            
                0.00 / 0.00%
             |             
            
                6.30
             |           
            
                6.30
             |               
            
                6.30
             |                           
            
                6.30
             | 
            
                6.30
             |                     
            
                4.61
             |                                 
            
                0
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/6/2013
             | 
            
                +0.10 / +1.61%
             |             
            
                6.30
             |           
            
                6.30
             |               
            
                6.30
             |                           
            
                6.30
             | 
            
                6.30
             |                     
            
                4.61
             |                                 
            
                10,200
             |            
            
                 
             |                                       
         
    
        
            | 
                3/5/2013
             | 
            
                -0.30 / -4.62%
             |             
            
                6.30
             |           
            
                6.30
             |               
            
                6.20
             |                           
            
                6.20
             | 
            
                6.28
             |                     
            
                4.53
             |                                 
            
                6,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/4/2013
             | 
            
                0.00 / 0.00%
             |             
            
                6.50
             |           
            
                6.50
             |               
            
                6.50
             |                           
            
                6.50
             | 
            
                6.50
             |                     
            
                4.75
             |                                 
            
                0
             |            
            
                 
             |                                       
         
    
        
            | 
                3/1/2013
             | 
            
                0.00 / 0.00%
             |             
            
                6.50
             |           
            
                6.50
             |               
            
                6.50
             |                           
            
                6.50
             | 
            
                6.50
             |                     
            
                4.75
             |                                 
            
                0
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/28/2013
             | 
            
                0.00 / 0.00%
             |             
            
                6.20
             |           
            
                6.50
             |               
            
                6.20
             |                           
            
                6.50
             | 
            
                6.23
             |                     
            
                4.75
             |                                 
            
                1,100
             |            
            
                 
             |                                       
         
    
        
            | 
                2/27/2013
             | 
            
                -0.10 / -1.52%
             |             
            
                6.50
             |           
            
                6.50
             |               
            
                6.20
             |                           
            
                6.50
             | 
            
                6.23
             |                     
            
                4.75
             |                                 
            
                2,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/26/2013
             | 
            
                0.00 / 0.00%
             |             
            
                6.40
             |           
            
                6.60
             |               
            
                6.30
             |                           
            
                6.60
             | 
            
                6.40
             |                     
            
                4.83
             |                                 
            
                3,300
             |            
            
                 
             |                                       
         
    
        
            | 
                2/25/2013
             | 
            
                0.00 / 0.00%
             |             
            
                6.60
             |           
            
                6.70
             |               
            
                6.60
             |                           
            
                6.60
             | 
            
                6.62
             |                     
            
                4.83
             |                                 
            
                14,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/22/2013
             | 
            
                +0.10 / +1.54%
             |             
            
                6.60
             |           
            
                6.60
             |               
            
                6.60
             |                           
            
                6.60
             | 
            
                6.60
             |                     
            
                4.83
             |                                 
            
                2,000
             |            
            
                 
             |                                       
         
    
        
            | 
                2/21/2013
             | 
            
                -0.40 / -5.80%
             |             
            
                6.50
             |           
            
                6.50
             |               
            
                6.50
             |                           
            
                6.50
             | 
            
                6.50
             |                     
            
                4.75
             |                                 
            
                53,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/20/2013
             | 
            
                +0.50 / +7.81%
             |             
            
                6.20
             |           
            
                6.90
             |               
            
                6.20
             |                           
            
                6.90
             | 
            
                6.56
             |                     
            
                5.04
             |                                 
            
                2,100
             |            
            
                 
             |                                       
         
    
        
            | 
                2/19/2013
             | 
            
                0.00 / 0.00%
             |             
            
                6.40
             |           
            
                6.40
             |               
            
                6.40
             |                           
            
                6.40
             | 
            
                6.40
             |                     
            
                4.68
             |                                 
            
                1,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/18/2013
             | 
            
                0.00 / 0.00%
             |             
            
                6.40
             |           
            
                6.40
             |               
            
                6.40
             |                           
            
                6.40
             | 
            
                6.40
             |                     
            
                4.68
             |                                 
            
                0
             |            
            
                 
             |                                       
         
    
        
            | 
                2/8/2013
             | 
            
                +0.10 / +1.59%
             |             
            
                6.40
             |           
            
                6.40
             |               
            
                6.40
             |                           
            
                6.40
             | 
            
                6.40
             |                     
            
                4.68
             |                                 
            
                500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/7/2013
             | 
            
                0.00 / 0.00%
             |             
            
                6.30
             |           
            
                6.30
             |               
            
                6.30
             |                           
            
                6.30
             | 
            
                6.30
             |                     
            
                4.61
             |                                 
            
                3,000
             |            
            
                 
             |                                       
         
    
        
            | 
                2/6/2013
             | 
            
                -0.10 / -1.56%
             |             
            
                6.40
             |           
            
                6.40
             |               
            
                6.30
             |                           
            
                6.30
             | 
            
                6.32
             |                     
            
                4.61
             |                                 
            
                12,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/5/2013
             | 
            
                0.00 / 0.00%
             |             
            
                6.30
             |           
            
                6.40
             |               
            
                6.30
             |                           
            
                6.40
             | 
            
                6.35
             |                     
            
                4.68
             |                                 
            
                3,900
             |            
            
                 
             |                                       
         
    
        
            | 
                2/4/2013
             | 
            
                0.00 / 0.00%
             |             
            
                6.40
             |           
            
                6.40
             |               
            
                6.40
             |                           
            
                6.40
             | 
            
                6.40
             |                     
            
                4.68
             |                                 
            
                2,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/1/2013
             | 
            
                0.00 / 0.00%
             |             
            
                6.40
             |           
            
                6.40
             |               
            
                6.40
             |                           
            
                6.40
             | 
            
                6.40
             |                     
            
                4.68
             |                                 
            
                0
             |            
            
                 
             |                                       
         
    
        
            | 
                1/31/2013
             | 
            
                -0.20 / -3.03%
             |             
            
                6.30
             |           
            
                6.40
             |               
            
                6.30
             |                           
            
                6.40
             | 
            
                6.33
             |                     
            
                4.68
             |                                 
            
                3,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/30/2013
             | 
            
                +0.10 / +1.54%
             |             
            
                6.40
             |           
            
                6.60
             |               
            
                6.40
             |                           
            
                6.60
             | 
            
                6.41
             |                     
            
                4.83
             |                                 
            
                5,600
             |            
            
                 
             |                                       
         
    
        
            | 
                1/29/2013
             | 
            
                0.00 / 0.00%
             |             
            
                6.40
             |           
            
                6.50
             |               
            
                6.40
             |                           
            
                6.50
             | 
            
                6.41
             |                     
            
                4.75
             |                                 
            
                1,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/28/2013
             | 
            
                0.00 / 0.00%
             |             
            
                6.50
             |           
            
                6.50
             |               
            
                6.50
             |                           
            
                6.50
             | 
            
                6.50
             |                     
            
                4.75
             |                                 
            
                400
             |            
            
                 
             |                                       
         
    
        
            | 
                1/25/2013
             | 
            
                0.00 / 0.00%
             |             
            
                6.50
             |           
            
                6.50
             |               
            
                6.50
             |                           
            
                6.50
             | 
            
                6.50
             |                     
            
                4.75
             |                                 
            
                7,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/24/2013
             | 
            
                -0.30 / -4.41%
             |             
            
                6.50
             |           
            
                6.50
             |               
            
                6.50
             |                           
            
                6.50
             | 
            
                6.50
             |                     
            
                4.75
             |                                 
            
                3,000
             |            
            
                 
             |                                       
         
    
        
            | 
                1/23/2013
             | 
            
                0.00 / 0.00%
             |             
            
                6.80
             |           
            
                6.80
             |               
            
                6.80
             |                           
            
                6.80
             | 
            
                6.80
             |                     
            
                4.97
             |                                 
            
                0
             |  
            
                 
             |                                                              
             
    
         
    
    
 |