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                    Closing price on 12/17/2012
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                    | Open | 3.90 |  
                    | High | 3.90 |  
                    | Low | 3.80 |  
                    | Volume | 6,900 |  
                    | Split-adjusted Price | 3.90 |  
                
             | 
 |  PSI Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 12/17/2012 | 0.00 / 0.00% | 3.90 | 3.90 | 3.80 | 3.90 | 3.90 | 3.90 | 6,900 |   |  
            | 12/14/2012 | -0.10 / -2.50% | 3.90 | 3.90 | 3.80 | 3.90 | 3.90 | 3.90 | 22,400 |   |  			
            | 12/13/2012 | 0.00 / 0.00% | 3.80 | 4.00 | 3.80 | 4.00 | 4.00 | 4.00 | 76,700 |   |  
            | 12/12/2012 | +0.20 / +5.26% | 3.70 | 4.00 | 3.70 | 4.00 | 4.00 | 4.00 | 48,000 |   |  			
            | 12/11/2012 | +0.10 / +2.70% | 3.70 | 3.80 | 3.70 | 3.80 | 3.80 | 3.80 | 131,790 |   |  
            | 12/10/2012 | +0.10 / +2.78% | 3.60 | 3.80 | 3.60 | 3.70 | 3.70 | 3.70 | 36,100 |   |  			
            | 12/7/2012 | 0.00 / 0.00% | 3.50 | 3.60 | 3.50 | 3.60 | 3.60 | 3.60 | 1,200 |   |  
            | 12/6/2012 | +0.10 / +2.86% | 3.60 | 3.60 | 3.50 | 3.60 | 3.60 | 3.60 | 23,800 |   |  			
            | 12/5/2012 | 0.00 / 0.00% | 3.40 | 3.60 | 3.40 | 3.50 | 3.50 | 3.50 | 32,100 |   |  
            | 12/4/2012 | +0.10 / +2.94% | 3.40 | 3.50 | 3.40 | 3.50 | 3.50 | 3.50 | 34,700 |   |  			
            | 12/3/2012 | 0.00 / 0.00% | 3.40 | 3.40 | 3.30 | 3.40 | 3.40 | 3.40 | 2,500 |   |  
            | 11/30/2012 | -0.10 / -2.86% | 3.30 | 3.40 | 3.30 | 3.40 | 3.40 | 3.40 | 5,100 |   |  			
            | 11/29/2012 | +0.20 / +6.06% | 3.30 | 3.50 | 3.20 | 3.50 | 3.50 | 3.50 | 14,525 |   |  
            | 11/28/2012 | -0.10 / -2.94% | 3.30 | 3.50 | 3.30 | 3.30 | 3.30 | 3.30 | 8,600 |   |  			
            | 11/27/2012 | +0.10 / +3.03% | 3.30 | 3.40 | 3.30 | 3.40 | 3.40 | 3.40 | 7,800 |   |  
            | 11/26/2012 | -0.10 / -2.94% | 3.30 | 3.40 | 3.30 | 3.30 | 3.30 | 3.30 | 25,800 |   |  			
            | 11/23/2012 | 0.00 / 0.00% | 3.30 | 3.40 | 3.30 | 3.40 | 3.40 | 3.40 | 10,600 |   |  
            | 11/22/2012 | 0.00 / 0.00% | 3.40 | 3.40 | 3.30 | 3.40 | 3.40 | 3.40 | 295,400 |   |  			
            | 11/21/2012 | -0.20 / -5.56% | 3.40 | 3.40 | 3.40 | 3.40 | 3.40 | 3.40 | 100 |   |  
            | 11/20/2012 | +0.10 / +2.86% | 3.40 | 3.60 | 3.40 | 3.60 | 3.60 | 3.60 | 7,600 |   |  			
            | 11/19/2012 | +0.10 / +2.94% | 3.40 | 3.50 | 3.40 | 3.50 | 3.50 | 3.50 | 11,400 |   |  
            | 11/16/2012 | 0.00 / 0.00% | 3.50 | 3.50 | 3.40 | 3.40 | 3.40 | 3.40 | 800 |   |  			
            | 11/15/2012 | 0.00 / 0.00% | 3.50 | 3.50 | 3.40 | 3.40 | 3.40 | 3.40 | 3,500 |   |  
            | 11/14/2012 | 0.00 / 0.00% | 3.50 | 3.50 | 3.40 | 3.40 | 3.40 | 3.40 | 15,100 |   |  			
            | 11/13/2012 | -0.20 / -5.56% | 3.50 | 3.60 | 3.40 | 3.40 | 3.40 | 3.40 | 44,950 |   |  
            | 11/12/2012 | +0.10 / +2.86% | 3.40 | 3.70 | 3.40 | 3.60 | 3.60 | 3.60 | 77,900 |   |  			
            | 11/9/2012 | 0.00 / 0.00% | 3.30 | 3.50 | 3.30 | 3.50 | 3.50 | 3.50 | 4,200 |   |  
            | 11/8/2012 | 0.00 / 0.00% | 3.40 | 3.50 | 3.30 | 3.50 | 3.50 | 3.50 | 4,400 |   |  			
            | 11/7/2012 | +0.20 / +6.06% | 3.50 | 3.50 | 3.50 | 3.50 | 3.50 | 3.50 | 500 |   |  
            | 11/6/2012 | -0.20 / -5.71% | 3.40 | 3.40 | 3.30 | 3.30 | 3.30 | 3.30 | 19,900 |   |  |