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                    Closing price on 7/26/2012
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                    | Open | 4.90 |  
                    | High | 5.00 |  
                    | Low | 4.90 |  
                    | Volume | 16,900 |  
                    | Split-adjusted Price | 5.00 |  
                
             | 
 |  PSI Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 7/26/2012 | +0.10 / +2.04% | 4.90 | 5.00 | 4.90 | 5.00 | 5.00 | 5.00 | 16,900 |   |  
            | 7/25/2012 | +0.10 / +2.08% | 4.80 | 4.90 | 4.70 | 4.90 | 4.90 | 4.90 | 112,400 |   |  			
            | 7/24/2012 | -0.30 / -5.88% | 4.90 | 4.90 | 4.80 | 4.80 | 4.80 | 4.80 | 79,000 |   |  
            | 7/23/2012 | -0.20 / -3.77% | 5.10 | 5.20 | 5.00 | 5.10 | 5.10 | 5.10 | 184,100 |   |  			
            | 7/20/2012 | +0.10 / +1.92% | 5.30 | 5.50 | 5.10 | 5.30 | 5.30 | 5.30 | 67,300 |   |  
            | 7/19/2012 | +0.30 / +6.12% | 4.80 | 5.20 | 4.80 | 5.20 | 5.20 | 5.20 | 297,600 |   |  			
            | 7/18/2012 | -0.10 / -2.00% | 4.90 | 5.00 | 4.80 | 4.90 | 4.90 | 4.90 | 29,400 |   |  
            | 7/17/2012 | +0.20 / +4.17% | 4.70 | 5.00 | 4.70 | 5.00 | 5.00 | 5.00 | 207,200 |   |  			
            | 7/16/2012 | -0.30 / -5.88% | 4.90 | 5.00 | 4.70 | 4.80 | 4.80 | 4.80 | 86,500 |   |  
            | 7/13/2012 | +0.20 / +4.08% | 5.10 | 5.10 | 4.80 | 5.10 | 5.10 | 5.10 | 218,200 |   |  			
            | 7/12/2012 | +0.20 / +4.26% | 4.70 | 4.90 | 4.50 | 4.90 | 4.90 | 4.90 | 23,400 |   |  
            | 7/11/2012 | +0.20 / +4.44% | 4.30 | 4.70 | 4.30 | 4.70 | 4.70 | 4.70 | 15,900 |   |  			
            | 7/10/2012 | +0.10 / +2.27% | 4.50 | 4.50 | 4.40 | 4.50 | 4.50 | 4.50 | 32,700 |   |  
            | 7/9/2012 | -0.30 / -6.38% | 4.50 | 4.70 | 4.40 | 4.40 | 4.40 | 4.40 | 129,200 |   |  			
            | 7/6/2012 | 0.00 / 0.00% | 4.80 | 4.90 | 4.70 | 4.70 | 4.70 | 4.70 | 63,500 |   |  
            | 7/5/2012 | +0.30 / +6.82% | 4.20 | 4.70 | 4.20 | 4.70 | 4.70 | 4.70 | 127,300 |   |  			
            | 7/4/2012 | -0.30 / -6.38% | 4.80 | 4.80 | 4.40 | 4.40 | 4.40 | 4.40 | 97,100 |   |  
            | 7/3/2012 | -0.40 / -7.84% | 4.70 | 5.00 | 4.60 | 4.70 | 4.70 | 4.70 | 86,525 |   |  			
            | 7/2/2012 | 0.00 / 0.00% | 5.10 | 5.20 | 4.90 | 5.10 | 5.10 | 5.10 | 80,100 |   |  
            | 6/29/2012 | -0.20 / -3.77% | 5.20 | 5.20 | 5.00 | 5.10 | 5.10 | 5.10 | 51,800 |   |  			
            | 6/28/2012 | +0.30 / +6.00% | 4.70 | 5.30 | 4.70 | 5.30 | 5.30 | 5.30 | 195,400 |   |  
            | 6/27/2012 | -0.10 / -1.96% | 5.10 | 5.20 | 5.00 | 5.00 | 5.00 | 5.00 | 65,800 |   |  			
            | 6/26/2012 | 0.00 / 0.00% | 5.20 | 5.20 | 4.90 | 5.10 | 5.10 | 5.10 | 191,200 |   |  
            | 6/25/2012 | -0.30 / -5.56% | 5.40 | 5.40 | 5.10 | 5.10 | 5.10 | 5.10 | 126,200 |   |  			
            | 6/22/2012 | -0.10 / -1.82% | 5.40 | 5.40 | 5.30 | 5.40 | 5.40 | 5.40 | 106,900 |   |  
            | 6/21/2012 | +0.10 / +1.85% | 5.30 | 5.50 | 5.30 | 5.50 | 5.50 | 5.50 | 53,600 |   |  			
            | 6/20/2012 | 0.00 / 0.00% | 5.40 | 5.50 | 5.30 | 5.40 | 5.40 | 5.40 | 53,700 |   |  
            | 6/19/2012 | -0.20 / -3.57% | 5.50 | 5.50 | 5.30 | 5.40 | 5.40 | 5.40 | 191,000 |   |  			
            | 6/18/2012 | 0.00 / 0.00% | 5.70 | 5.70 | 5.50 | 5.60 | 5.60 | 5.60 | 185,900 |   |  
            | 6/15/2012 | +0.40 / +7.69% | 5.30 | 5.60 | 5.30 | 5.60 | 5.60 | 5.60 | 127,500 |   |  |