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                    Closing price on 5/7/2009
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        |           
                
                    | Open | 18.20 |  
                    | High | 18.50 |  
                    | Low | 17.60 |  
                    | Volume | 219,500 |  
                    | Split-adjusted Price | 13.53 |  
                
             | 
 |  XMC Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 5/7/2009 | +1.00 / +5.71% | 18.20 | 18.50 | 17.60 | 18.50 | 18.34 | 13.53 | 219,500 |   |  
            | 5/6/2009 | -0.20 / -1.13% | 18.70 | 18.70 | 16.90 | 17.50 | 17.35 | 12.79 | 123,100 |   |  			
            | 5/5/2009 | +1.10 / +6.63% | 17.70 | 17.70 | 17.70 | 17.70 | 17.70 | 12.94 | 68,000 |   |  
            | 5/4/2009 | 0.00 / 0.00% | 16.60 | 16.60 | 16.60 | 16.60 | 16.60 | 12.14 | 141,700 |   |  			
            | 4/29/2009 | +0.40 / +2.61% | 15.50 | 15.80 | 15.00 | 15.70 | 15.63 | 11.48 | 38,500 |   |  
            | 4/28/2009 | -0.20 / -1.29% | 15.50 | 15.70 | 15.20 | 15.30 | 15.42 | 11.19 | 48,000 |   |  			
            | 4/27/2009 | 0.00 / 0.00% | 15.20 | 16.00 | 15.10 | 15.50 | 15.51 | 11.33 | 72,100 |   |  
            | 4/24/2009 | +1.00 / +6.90% | 15.40 | 15.50 | 13.50 | 15.50 | 15.10 | 11.33 | 121,300 |   |  			
            | 4/23/2009 | +0.90 / +6.62% | 14.50 | 14.50 | 14.00 | 14.50 | 14.48 | 10.60 | 41,200 |   |  
            | 4/22/2009 | -0.30 / -2.16% | 13.50 | 13.60 | 13.50 | 13.60 | 13.60 | 9.94 | 11,900 |   |  			
            | 4/21/2009 | +0.60 / +4.51% | 12.40 | 13.90 | 12.40 | 13.90 | 12.77 | 10.16 | 35,100 |   |  
            | 4/20/2009 | 0.00 / 0.00% | 13.30 | 13.90 | 13.30 | 13.30 | 13.34 | 9.72 | 60,900 |   |  			
            | 4/17/2009 | -1.10 / -7.24% | 15.00 | 15.00 | 14.10 | 14.10 | 14.31 | 10.31 | 67,800 |   |  
            | 4/16/2009 | -0.20 / -1.30% | 15.00 | 15.60 | 14.70 | 15.20 | 15.06 | 11.11 | 90,700 |   |  			
            | 4/15/2009 | -1.10 / -6.67% | 16.50 | 16.50 | 15.40 | 15.40 | 15.66 | 11.26 | 50,200 |   |  
            | 4/14/2009 | 0.00 / 0.00% | 17.00 | 17.00 | 16.30 | 16.50 | 16.52 | 12.06 | 68,800 |   |  			
            | 4/13/2009 | 0.00 / 0.00% | 16.40 | 16.50 | 16.00 | 16.50 | 16.43 | 12.06 | 93,300 |   |  
            | 4/10/2009 | +0.90 / +6.16% | 15.50 | 15.50 | 14.80 | 15.50 | 15.46 | 11.33 | 133,100 |   |  			
            | 4/9/2009 | -0.20 / -1.35% | 15.20 | 15.20 | 14.10 | 14.60 | 14.54 | 10.67 | 80,900 |   |  
            | 4/8/2009 | -1.20 / -7.50% | 16.00 | 16.10 | 14.80 | 14.80 | 15.10 | 10.82 | 86,900 |   |  			
            | 4/7/2009 | 0.00 / 0.00% | 16.00 | 16.00 | 15.20 | 16.00 | 15.88 | 11.70 | 56,600 |   |  
            | 4/3/2009 | +0.70 / +4.90% | 14.00 | 15.00 | 14.00 | 15.00 | 14.98 | 10.97 | 96,500 |   |  			
            | 4/2/2009 | +0.70 / +5.15% | 14.00 | 14.30 | 13.60 | 14.30 | 14.12 | 10.46 | 112,400 |   |  
            | 4/1/2009 | +0.20 / +1.49% | 13.50 | 13.70 | 13.10 | 13.60 | 13.42 | 9.94 | 38,800 |   |  			
            | 3/31/2009 | -0.40 / -2.90% | 13.10 | 13.40 | 12.50 | 13.40 | 12.86 | 9.80 | 41,900 |   |  
            | 3/30/2009 | 0.00 / 0.00% | 13.00 | 14.00 | 12.80 | 13.80 | 13.26 | 10.09 | 29,900 |   |  			
            | 3/27/2009 | +0.70 / +5.60% | 12.90 | 13.30 | 12.60 | 13.20 | 13.15 | 9.65 | 113,200 |   |  
            | 3/26/2009 | 0.00 / 0.00% | 12.50 | 12.80 | 12.40 | 12.50 | 12.47 | 9.14 | 28,100 |   |  			
            | 3/25/2009 | -0.20 / -1.57% | 12.60 | 12.60 | 12.40 | 12.50 | 12.54 | 9.14 | 37,700 |   |  
            | 3/24/2009 | +0.70 / +5.83% | 12.60 | 12.70 | 12.40 | 12.70 | 12.59 | 9.29 | 23,200 |   |  |