| 
                 
                    Closing price on 8/9/2012
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    5.20 | 
                 
                
                    | High | 
                    5.30 | 
                 
                
                    | Low | 
                    5.00 | 
                     
                
                    | Volume | 
                    195,900 | 
                                 
                
                    | Split-adjusted Price | 
                    4.38 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
IVS Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                8/9/2012
             | 
            
                0.00 / 0.00%
             |             
            
                5.20
             |           
            
                5.30
             |               
            
                5.00
             |                           
            
                5.10
             | 
            
                5.15
             |                     
            
                4.38
             |                                 
            
                195,900
             |            
            
                 
             |                                       
         
    
        
            | 
                8/8/2012
             | 
            
                +0.10 / +2.00%
             |             
            
                5.00
             |           
            
                5.20
             |               
            
                4.90
             |                           
            
                5.10
             | 
            
                5.06
             |                     
            
                4.38
             |                                 
            
                499,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/7/2012
             | 
            
                -0.20 / -3.85%
             |             
            
                5.10
             |           
            
                5.20
             |               
            
                5.00
             |                           
            
                5.00
             | 
            
                5.10
             |                     
            
                4.29
             |                                 
            
                192,600
             |            
            
                 
             |                                       
         
    
        
            | 
                8/6/2012
             | 
            
                +0.30 / +6.12%
             |             
            
                4.90
             |           
            
                5.20
             |               
            
                4.90
             |                           
            
                5.20
             | 
            
                5.06
             |                     
            
                4.47
             |                                 
            
                278,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/3/2012
             | 
            
                0.00 / 0.00%
             |             
            
                4.80
             |           
            
                5.00
             |               
            
                4.70
             |                           
            
                4.90
             | 
            
                4.89
             |                     
            
                4.21
             |                                 
            
                222,200
             |            
            
                 
             |                                       
         
    
        
            | 
                8/2/2012
             | 
            
                -0.10 / -2.00%
             |             
            
                4.90
             |           
            
                5.00
             |               
            
                4.90
             |                           
            
                4.90
             | 
            
                4.99
             |                     
            
                4.21
             |                                 
            
                463,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/1/2012
             | 
            
                0.00 / 0.00%
             |             
            
                4.90
             |           
            
                5.00
             |               
            
                4.90
             |                           
            
                5.00
             | 
            
                4.94
             |                     
            
                4.29
             |                                 
            
                62,100
             |            
            
                 
             |                                       
         
    
        
            | 
                7/31/2012
             | 
            
                +0.10 / +2.04%
             |             
            
                4.90
             |           
            
                5.10
             |               
            
                4.90
             |                           
            
                5.00
             | 
            
                4.99
             |                     
            
                4.29
             |                                 
            
                137,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/30/2012
             | 
            
                0.00 / 0.00%
             |             
            
                4.90
             |           
            
                5.00
             |               
            
                4.90
             |                           
            
                4.90
             | 
            
                4.95
             |                     
            
                4.21
             |                                 
            
                164,700
             |            
            
                 
             |                                       
         
    
        
            | 
                7/27/2012
             | 
            
                0.00 / 0.00%
             |             
            
                5.10
             |           
            
                5.10
             |               
            
                4.90
             |                           
            
                4.90
             | 
            
                5.04
             |                     
            
                4.21
             |                                 
            
                65,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/26/2012
             | 
            
                0.00 / 0.00%
             |             
            
                4.90
             |           
            
                5.20
             |               
            
                4.90
             |                           
            
                4.90
             | 
            
                4.95
             |                     
            
                4.21
             |                                 
            
                251,400
             |            
            
                 
             |                                       
         
    
        
            | 
                7/25/2012
             | 
            
                -0.20 / -3.92%
             |             
            
                5.00
             |           
            
                5.10
             |               
            
                4.90
             |                           
            
                4.90
             | 
            
                4.98
             |                     
            
                4.21
             |                                 
            
                322,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/24/2012
             | 
            
                -0.30 / -5.56%
             |             
            
                5.30
             |           
            
                5.40
             |               
            
                5.10
             |                           
            
                5.10
             | 
            
                5.23
             |                     
            
                4.38
             |                                 
            
                311,700
             |            
            
                 
             |                                       
         
    
        
            | 
                7/23/2012
             | 
            
                -0.40 / -6.90%
             |             
            
                5.70
             |           
            
                5.70
             |               
            
                5.40
             |                           
            
                5.40
             | 
            
                5.55
             |                     
            
                4.64
             |                                 
            
                363,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/20/2012
             | 
            
                +0.10 / +1.75%
             |             
            
                5.70
             |           
            
                5.80
             |               
            
                5.50
             |                           
            
                5.80
             | 
            
                5.72
             |                     
            
                4.98
             |                                 
            
                124,900
             |            
            
                 
             |                                       
         
    
        
            | 
                7/19/2012
             | 
            
                +0.30 / +5.56%
             |             
            
                5.50
             |           
            
                5.70
             |               
            
                5.30
             |                           
            
                5.70
             | 
            
                5.52
             |                     
            
                4.89
             |                                 
            
                151,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/18/2012
             | 
            
                0.00 / 0.00%
             |             
            
                5.30
             |           
            
                5.50
             |               
            
                5.20
             |                           
            
                5.40
             | 
            
                5.35
             |                     
            
                4.64
             |                                 
            
                112,200
             |            
            
                 
             |                                       
         
    
        
            | 
                7/17/2012
             | 
            
                +0.20 / +3.85%
             |             
            
                5.30
             |           
            
                5.40
             |               
            
                5.00
             |                           
            
                5.40
             | 
            
                5.24
             |                     
            
                4.64
             |                                 
            
                103,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/16/2012
             | 
            
                -0.10 / -1.89%
             |             
            
                5.40
             |           
            
                5.50
             |               
            
                5.10
             |                           
            
                5.20
             | 
            
                5.34
             |                     
            
                4.47
             |                                 
            
                63,700
             |            
            
                 
             |                                       
         
    
        
            | 
                7/13/2012
             | 
            
                +0.10 / +1.92%
             |             
            
                5.30
             |           
            
                5.40
             |               
            
                5.10
             |                           
            
                5.30
             | 
            
                5.25
             |                     
            
                4.55
             |                                 
            
                104,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/12/2012
             | 
            
                0.00 / 0.00%
             |             
            
                5.20
             |           
            
                5.30
             |               
            
                5.00
             |                           
            
                5.20
             | 
            
                5.14
             |                     
            
                4.47
             |                                 
            
                98,000
             |            
            
                 
             |                                       
         
    
        
            | 
                7/11/2012
             | 
            
                0.00 / 0.00%
             |             
            
                5.30
             |           
            
                5.30
             |               
            
                4.90
             |                           
            
                5.20
             | 
            
                5.01
             |                     
            
                4.47
             |                                 
            
                83,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/10/2012
             | 
            
                -0.10 / -1.89%
             |             
            
                5.30
             |           
            
                5.30
             |               
            
                5.10
             |                           
            
                5.20
             | 
            
                5.20
             |                     
            
                4.47
             |                                 
            
                80,300
             |            
            
                 
             |                                       
         
    
        
            | 
                7/9/2012
             | 
            
                0.00 / 0.00%
             |             
            
                5.50
             |           
            
                5.60
             |               
            
                5.20
             |                           
            
                5.30
             | 
            
                5.38
             |                     
            
                4.55
             |                                 
            
                86,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/6/2012
             | 
            
                -0.10 / -1.85%
             |             
            
                5.40
             |           
            
                5.50
             |               
            
                5.20
             |                           
            
                5.30
             | 
            
                5.41
             |                     
            
                4.55
             |                                 
            
                59,700
             |            
            
                 
             |                                       
         
    
        
            | 
                7/5/2012
             | 
            
                +0.30 / +5.88%
             |             
            
                5.20
             |           
            
                5.40
             |               
            
                4.90
             |                           
            
                5.40
             | 
            
                5.16
             |                     
            
                4.64
             |                                 
            
                143,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/4/2012
             | 
            
                -0.10 / -1.92%
             |             
            
                5.20
             |           
            
                5.30
             |               
            
                4.90
             |                           
            
                5.10
             | 
            
                5.14
             |                     
            
                4.38
             |                                 
            
                126,500
             |            
            
                 
             |                                       
         
    
        
            | 
                7/3/2012
             | 
            
                -0.30 / -5.45%
             |             
            
                5.50
             |           
            
                5.60
             |               
            
                5.20
             |                           
            
                5.20
             | 
            
                5.50
             |                     
            
                4.47
             |                                 
            
                50,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/2/2012
             | 
            
                -0.40 / -6.78%
             |             
            
                5.80
             |           
            
                5.80
             |               
            
                5.50
             |                           
            
                5.50
             | 
            
                5.70
             |                     
            
                4.72
             |                                 
            
                72,100
             |            
            
                 
             |                                       
         
    
        
            | 
                6/29/2012
             | 
            
                0.00 / 0.00%
             |             
            
                5.90
             |           
            
                5.90
             |               
            
                5.50
             |                           
            
                5.90
             | 
            
                5.79
             |                     
            
                5.07
             |                                 
            
                90,900
             |  
            
                 
             |                                                              
             
    
         
    
    
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