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            | 
                    Closing price on 1/18/2013
                 |  |  
    
        |           
                
                    | Open | 4.40 |  
                    | High | 4.40 |  
                    | Low | 3.90 |  
                    | Volume | 242,690 |  
                    | Split-adjusted Price | 3.90 |  
                
             | 
 |  PSI Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 1/18/2013 | -0.50 / -11.36% | 4.40 | 4.40 | 3.90 | 3.90 | 3.90 | 3.90 | 242,690 |   |  
            | 1/17/2013 | -0.40 / -8.33% | 4.70 | 4.70 | 4.30 | 4.40 | 4.40 | 4.40 | 95,200 |   |  			
            | 1/16/2013 | +0.20 / +4.35% | 4.70 | 4.80 | 4.50 | 4.80 | 4.80 | 4.80 | 59,300 |   |  
            | 1/15/2013 | +0.20 / +4.55% | 4.00 | 4.60 | 4.00 | 4.60 | 4.60 | 4.60 | 356,700 |   |  			
            | 1/14/2013 | 0.00 / 0.00% | 4.30 | 4.40 | 4.20 | 4.40 | 4.40 | 4.40 | 36,000 |   |  
            | 1/11/2013 | +0.20 / +4.76% | 4.30 | 4.40 | 4.00 | 4.40 | 4.40 | 4.40 | 273,100 |   |  			
            | 1/10/2013 | 0.00 / 0.00% | 4.00 | 4.20 | 4.00 | 4.20 | 4.20 | 4.20 | 15,400 |   |  
            | 1/9/2013 | -0.10 / -2.33% | 4.30 | 4.40 | 4.00 | 4.20 | 4.20 | 4.20 | 168,600 |   |  			
            | 1/8/2013 | +0.20 / +4.88% | 4.10 | 4.30 | 4.10 | 4.30 | 4.30 | 4.30 | 50,900 |   |  
            | 1/7/2013 | -0.20 / -4.65% | 4.10 | 4.30 | 4.10 | 4.10 | 4.10 | 4.10 | 89,700 |   |  			
            | 1/4/2013 | +0.10 / +2.38% | 4.20 | 4.30 | 4.00 | 4.30 | 4.30 | 4.30 | 40,700 |   |  
            | 1/3/2013 | 0.00 / 0.00% | 4.30 | 4.30 | 4.10 | 4.20 | 4.20 | 4.20 | 52,900 |   |  			
            | 1/2/2013 | +0.10 / +2.44% | 4.10 | 4.20 | 4.00 | 4.20 | 4.20 | 4.20 | 62,400 |   |  
            | 12/28/2012 | +0.10 / +2.50% | 3.90 | 4.10 | 3.90 | 4.10 | 4.10 | 4.10 | 39,800 |   |  			
            | 12/27/2012 | +0.10 / +2.56% | 3.90 | 4.00 | 3.80 | 4.00 | 4.00 | 4.00 | 38,800 |   |  
            | 12/26/2012 | 0.00 / 0.00% | 3.80 | 4.00 | 3.80 | 3.90 | 3.90 | 3.90 | 34,300 |   |  			
            | 12/25/2012 | 0.00 / 0.00% | 3.90 | 3.90 | 3.80 | 3.90 | 3.90 | 3.90 | 17,800 |   |  
            | 12/24/2012 | +0.10 / +2.63% | 3.90 | 3.90 | 3.80 | 3.90 | 3.90 | 3.90 | 17,200 |   |  			
            | 12/21/2012 | -0.10 / -2.56% | 3.80 | 3.80 | 3.80 | 3.80 | 3.80 | 3.80 | 1,500 |   |  
            | 12/20/2012 | 0.00 / 0.00% | 3.90 | 3.90 | 3.80 | 3.90 | 3.90 | 3.90 | 7,600 |   |  			
            | 12/19/2012 | +0.10 / +2.63% | 3.80 | 3.90 | 3.80 | 3.90 | 3.90 | 3.90 | 24,800 |   |  
            | 12/18/2012 | -0.10 / -2.56% | 3.70 | 3.80 | 3.70 | 3.80 | 3.80 | 3.80 | 35,900 |   |  			
            | 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 |   |  |