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                    Closing price on 10/3/2012
                 |  |  
    
        |           
                
                    | Open | 3.50 |  
                    | High | 3.60 |  
                    | Low | 3.20 |  
                    | Volume | 68,600 |  
                    | Split-adjusted Price | 3.60 |  
                
             | 
 |  PSI Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 10/3/2012 | +0.20 / +5.88% | 3.50 | 3.60 | 3.20 | 3.60 | 3.60 | 3.60 | 68,600 |   |  
            | 10/2/2012 | -0.10 / -2.86% | 3.50 | 3.50 | 3.40 | 3.40 | 3.40 | 3.40 | 15,200 |   |  			
            | 10/1/2012 | +0.10 / +2.94% | 3.60 | 3.60 | 3.50 | 3.50 | 3.50 | 3.50 | 118,400 |   |  
            | 9/28/2012 | -0.20 / -5.56% | 3.50 | 3.70 | 3.40 | 3.40 | 3.40 | 3.40 | 62,100 |   |  			
            | 9/27/2012 | -0.10 / -2.70% | 3.70 | 3.70 | 3.50 | 3.60 | 3.60 | 3.60 | 39,800 |   |  
            | 9/26/2012 | 0.00 / 0.00% | 3.60 | 3.70 | 3.50 | 3.70 | 3.70 | 3.70 | 12,100 |   |  			
            | 9/25/2012 | +0.10 / +2.78% | 3.40 | 3.70 | 3.40 | 3.70 | 3.70 | 3.70 | 43,000 |   |  
            | 9/24/2012 | -0.20 / -5.26% | 3.60 | 3.80 | 3.60 | 3.60 | 3.60 | 3.60 | 43,800 |   |  			
            | 9/21/2012 | 0.00 / 0.00% | 3.80 | 3.90 | 3.70 | 3.80 | 3.80 | 3.80 | 38,550 |   |  
            | 9/20/2012 | 0.00 / 0.00% | 3.60 | 3.80 | 3.60 | 3.80 | 3.80 | 3.80 | 13,600 |   |  			
            | 9/19/2012 | +0.10 / +2.70% | 3.50 | 3.80 | 3.50 | 3.80 | 3.80 | 3.80 | 30,400 |   |  
            | 9/18/2012 | -0.20 / -5.13% | 3.70 | 3.80 | 3.70 | 3.70 | 3.70 | 3.70 | 90,890 |   |  			
            | 9/17/2012 | +0.10 / +2.63% | 3.80 | 3.90 | 3.70 | 3.90 | 3.90 | 3.90 | 31,700 |   |  
            | 9/14/2012 | +0.20 / +5.56% | 3.70 | 3.80 | 3.60 | 3.80 | 3.80 | 3.80 | 140,300 |   |  			
            | 9/13/2012 | -0.10 / -2.70% | 3.70 | 3.70 | 3.50 | 3.60 | 3.60 | 3.60 | 276,800 |   |  
            | 9/12/2012 | -0.20 / -5.13% | 3.80 | 3.90 | 3.70 | 3.70 | 3.70 | 3.70 | 105,100 |   |  			
            | 9/11/2012 | -0.20 / -4.88% | 4.00 | 4.00 | 3.90 | 3.90 | 3.90 | 3.90 | 70,500 |   |  
            | 9/10/2012 | -0.30 / -6.82% | 4.10 | 4.10 | 4.00 | 4.10 | 4.10 | 4.10 | 12,200 |   |  			
            | 9/7/2012 | 0.00 / 0.00% | 4.30 | 4.40 | 4.20 | 4.40 | 4.40 | 4.40 | 11,200 |   |  
            | 9/6/2012 | -0.10 / -2.22% | 4.30 | 4.40 | 4.10 | 4.40 | 4.40 | 4.40 | 170,600 |   |  			
            | 9/5/2012 | 0.00 / 0.00% | 4.50 | 4.50 | 4.20 | 4.50 | 4.50 | 4.50 | 1,200 |   |  
            | 9/4/2012 | 0.00 / 0.00% | 4.60 | 4.60 | 4.50 | 4.50 | 4.50 | 4.50 | 190,200 |   |  			
            | 8/31/2012 | 0.00 / 0.00% | 4.50 | 4.50 | 4.30 | 4.50 | 4.50 | 4.50 | 62,300 |   |  
            | 8/30/2012 | -0.10 / -2.17% | 4.40 | 4.60 | 4.30 | 4.50 | 4.50 | 4.50 | 116,100 |   |  			
            | 8/29/2012 | +0.20 / +4.55% | 4.40 | 4.60 | 4.20 | 4.60 | 4.60 | 4.60 | 10,600 |   |  
            | 8/28/2012 | -0.10 / -2.22% | 4.30 | 4.50 | 4.20 | 4.40 | 4.40 | 4.40 | 61,900 |   |  			
            | 8/27/2012 | -0.20 / -4.26% | 4.40 | 4.50 | 4.30 | 4.50 | 4.50 | 4.50 | 99,900 |   |  
            | 8/24/2012 | +0.30 / +6.82% | 4.20 | 4.70 | 4.10 | 4.70 | 4.70 | 4.70 | 62,100 |   |  			
            | 8/23/2012 | -0.40 / -8.33% | 4.50 | 4.50 | 4.40 | 4.40 | 4.40 | 4.40 | 154,400 |   |  
            | 8/22/2012 | +0.10 / +2.13% | 4.60 | 4.80 | 4.60 | 4.80 | 4.80 | 4.80 | 173,000 |   |  |