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                    Closing price on 9/4/2009
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        |           
                
                    | Open | 30.20 |  
                    | High | 30.50 |  
                    | Low | 28.80 |  
                    | Volume | 163,500 |  
                    | Split-adjusted Price | 21.06 |  
                
             | 
 |  XMC Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 9/4/2009 | -1.00 / -3.36% | 30.20 | 30.50 | 28.80 | 28.80 | 29.74 | 21.06 | 163,500 |   |  
            | 9/3/2009 | 0.00 / 0.00% | 30.50 | 31.00 | 29.60 | 29.80 | 30.31 | 21.79 | 139,000 |   |  			
            | 9/1/2009 | -1.90 / -5.67% | 31.10 | 32.50 | 31.00 | 31.60 | 31.44 | 23.10 | 188,600 |   |  
            | 8/31/2009 | 0.00 / 0.00% | 34.50 | 34.50 | 32.00 | 33.50 | 33.21 | 24.49 | 273,700 |   |  			
            | 8/28/2009 | +2.10 / +6.95% | 32.30 | 32.30 | 32.00 | 32.30 | 32.28 | 23.62 | 133,400 |   |  
            | 8/27/2009 | +1.30 / +4.50% | 30.20 | 30.20 | 29.30 | 30.20 | 30.15 | 22.08 | 256,900 |   |  			
            | 8/26/2009 | +1.70 / +6.25% | 27.00 | 28.90 | 27.00 | 28.90 | 28.25 | 21.13 | 180,900 |   |  
            | 8/25/2009 | -0.10 / -0.37% | 27.50 | 27.50 | 26.00 | 27.20 | 27.08 | 19.89 | 248,100 |   |  			
            | 8/24/2009 | 0.00 / 0.00% | 28.00 | 28.00 | 26.30 | 27.30 | 27.72 | 19.96 | 298,100 |   |  
            | 8/21/2009 | +1.70 / +6.94% | 26.20 | 26.20 | 26.20 | 26.20 | 26.20 | 19.16 | 130,600 |   |  			
            | 8/20/2009 | +1.20 / +5.15% | 24.50 | 24.50 | 24.00 | 24.50 | 24.50 | 17.91 | 301,800 |   |  
            | 8/19/2009 | +1.40 / +6.39% | 22.00 | 23.30 | 21.90 | 23.30 | 22.95 | 17.04 | 103,900 |   |  			
            | 8/18/2009 | -0.30 / -1.35% | 20.40 | 22.00 | 20.40 | 21.90 | 21.79 | 16.01 | 42,300 |   |  
            | 8/17/2009 | 0.00 / 0.00% | 21.90 | 22.20 | 21.70 | 22.20 | 21.89 | 16.23 | 53,800 |   |  			
            | 8/14/2009 | -0.10 / -0.45% | 22.20 | 22.20 | 21.90 | 21.90 | 21.97 | 16.01 | 15,000 |   |  
            | 8/13/2009 | -0.10 / -0.45% | 22.80 | 22.80 | 22.00 | 22.00 | 22.20 | 16.08 | 36,600 |   |  			
            | 8/12/2009 | +0.20 / +0.91% | 22.50 | 22.50 | 21.80 | 22.10 | 22.04 | 16.16 | 39,800 |   |  
            | 8/11/2009 | +0.30 / +1.39% | 21.50 | 22.20 | 21.40 | 21.90 | 21.73 | 16.01 | 45,200 |   |  			
            | 8/10/2009 | 0.00 / 0.00% | 21.50 | 21.80 | 21.50 | 21.60 | 21.60 | 15.79 | 33,300 |   |  
            | 8/7/2009 | +0.20 / +0.94% | 21.10 | 21.50 | 21.10 | 21.50 | 21.41 | 15.72 | 28,800 |   |  			
            | 8/6/2009 | -0.20 / -0.93% | 21.50 | 22.00 | 21.00 | 21.30 | 21.50 | 15.57 | 25,800 |   |  
            | 8/5/2009 | 0.00 / 0.00% | 21.10 | 22.00 | 21.10 | 21.50 | 21.59 | 15.72 | 10,700 |   |  			
            | 8/4/2009 | +0.30 / +1.42% | 21.80 | 21.80 | 21.30 | 21.50 | 21.51 | 15.72 | 16,500 |   |  
            | 8/3/2009 | 0.00 / 0.00% | 21.50 | 21.50 | 21.20 | 21.20 | 21.33 | 15.50 | 9,000 |   |  			
            | 7/31/2009 | +1.00 / +4.76% | 22.00 | 22.00 | 21.70 | 22.00 | 21.90 | 16.08 | 23,000 |   |  
            | 7/30/2009 | -0.70 / -3.23% | 21.00 | 22.00 | 20.50 | 21.00 | 21.08 | 15.35 | 16,800 |   |  			
            | 7/29/2009 | +0.10 / +0.46% | 22.50 | 22.50 | 21.50 | 21.70 | 21.96 | 15.87 | 29,400 |   |  
            | 7/28/2009 | -1.00 / -4.42% | 23.00 | 23.00 | 21.40 | 21.60 | 22.16 | 15.79 | 47,900 |   |  			
            | 7/27/2009 | 0.00 / 0.00% | 24.00 | 24.00 | 22.00 | 22.60 | 22.95 | 16.52 | 60,100 |   |  
            | 7/24/2009 | +1.00 / +4.65% | 22.40 | 22.50 | 22.40 | 22.50 | 22.49 | 16.45 | 77,200 |   |  |