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                    Closing price on 4/16/2010
                 |  |  
    
        |           
                
                    | Open | 22.00 |  
                    | High | 22.10 |  
                    | Low | 21.00 |  
                    | Volume | 3,200 |  
                    | Split-adjusted Price | 11.08 |  
                
             | 
 |  NGC Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 4/16/2010 | +1.10 / +5.24% | 22.00 | 22.10 | 21.00 | 22.10 | 21.49 | 11.08 | 3,200 |   |  
            | 4/15/2010 | +0.50 / +2.44% | 20.60 | 21.00 | 20.60 | 21.00 | 20.96 | 10.53 | 1,100 |   |  			
            | 4/14/2010 | -0.70 / -3.30% | 20.50 | 20.50 | 20.50 | 20.50 | 20.50 | 10.28 | 2,000 |   |  
            | 4/13/2010 | -1.30 / -5.78% | 21.20 | 21.20 | 21.20 | 21.20 | 21.20 | 10.63 | 400 |   |  			
            | 4/12/2010 | +1.30 / +6.13% | 22.50 | 22.50 | 22.50 | 22.50 | 22.50 | 11.28 | 2,000 |   |  
            | 4/9/2010 | -0.70 / -3.20% | 23.40 | 23.40 | 21.00 | 21.20 | 21.10 | 10.63 | 4,800 |   |  			
            | 4/8/2010 | 0.00 / 0.00% | 21.90 | 21.90 | 21.90 | 21.90 | 21.90 | 10.98 | 0 |   |  
            | 4/7/2010 | +0.90 / +4.29% | 21.90 | 21.90 | 21.90 | 21.90 | 21.90 | 10.98 | 0 |   |  			
            | 4/6/2010 | 0.00 / 0.00% | 22.20 | 22.20 | 21.00 | 21.00 | 21.86 | 10.53 | 1,300 |   |  
            | 4/5/2010 | -1.00 / -4.55% | 20.50 | 21.00 | 20.50 | 21.00 | 20.84 | 10.53 | 800 |   |  			
            | 4/2/2010 | -0.50 / -2.22% | 22.00 | 22.00 | 22.00 | 22.00 | 22.00 | 11.03 | 100 |   |  
            | 4/1/2010 | +1.00 / +4.65% | 21.00 | 22.50 | 20.50 | 22.50 | 21.00 | 11.28 | 500 |   |  			
            | 3/31/2010 | 0.00 / 0.00% | 21.50 | 21.50 | 21.50 | 21.50 | 21.50 | 10.78 | 100 |   |  
            | 3/30/2010 | 0.00 / 0.00% | 21.50 | 21.50 | 21.50 | 21.50 | 21.50 | 10.78 | 0 |   |  			
            | 3/29/2010 | 0.00 / 0.00% | 21.50 | 21.50 | 21.50 | 21.50 | 21.50 | 10.78 | 0 |   |  
            | 3/26/2010 | -1.00 / -4.44% | 21.50 | 21.50 | 21.50 | 21.50 | 21.50 | 10.78 | 500 |   |  			
            | 3/25/2010 | 0.00 / 0.00% | 22.50 | 22.50 | 22.50 | 22.50 | 22.50 | 11.28 | 0 |   |  
            | 3/24/2010 | 0.00 / 0.00% | 22.50 | 22.50 | 22.50 | 22.50 | 22.50 | 11.28 | 0 |   |  			
            | 3/23/2010 | -0.50 / -2.17% | 22.50 | 22.50 | 22.50 | 22.50 | 22.50 | 11.28 | 1,000 |   |  
            | 3/22/2010 | 0.00 / 0.00% | 23.00 | 23.00 | 23.00 | 23.00 | 23.00 | 11.53 | 0 |   |  			
            | 3/19/2010 | 0.00 / 0.00% | 23.50 | 23.50 | 23.00 | 23.00 | 23.03 | 11.53 | 1,800 |   |  
            | 3/18/2010 | +1.50 / +6.98% | 21.70 | 23.00 | 21.00 | 23.00 | 22.44 | 11.53 | 7,200 |   |  			
            | 3/17/2010 | -0.60 / -2.71% | 22.20 | 22.20 | 21.20 | 21.50 | 21.49 | 10.78 | 4,900 |   |  
            | 3/16/2010 | -1.00 / -4.33% | 24.70 | 24.70 | 22.00 | 22.10 | 22.23 | 11.08 | 1,500 |   |  			
            | 3/15/2010 | +1.50 / +6.94% | 23.10 | 23.10 | 23.10 | 23.10 | 23.10 | 11.58 | 1,500 |   |  
            | 3/12/2010 | +1.20 / +5.88% | 21.60 | 21.60 | 21.60 | 21.60 | 21.60 | 10.83 | 1,600 |   |  			
            | 3/11/2010 | -2.10 / -9.33% | 21.00 | 21.00 | 20.00 | 20.40 | 20.18 | 10.23 | 800 |   |  
            | 3/10/2010 | +1.70 / +8.17% | 20.10 | 22.50 | 20.10 | 22.50 | 21.23 | 11.28 | 4,800 |   |  			
            | 3/9/2010 | -0.50 / -2.35% | 22.70 | 22.70 | 20.80 | 20.80 | 21.13 | 10.43 | 700 |   |  
            | 3/8/2010 | -2.00 / -8.58% | 21.30 | 23.80 | 21.30 | 21.30 | 21.44 | 10.68 | 6,100 |   |  |