| 
                 
                    Closing price on 10/27/2011
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    5.00 | 
                 
                
                    | High | 
                    5.00 | 
                 
                
                    | Low | 
                    4.90 | 
                     
                
                    | Volume | 
                    69,400 | 
                                 
                
                    | Split-adjusted Price | 
                    4.29 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
IVS Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                10/27/2011
             | 
            
                +0.30 / +6.38%
             |             
            
                5.00
             |           
            
                5.00
             |               
            
                4.90
             |                           
            
                5.00
             | 
            
                5.00
             |                     
            
                4.29
             |                                 
            
                69,400
             |            
            
                 
             |                                       
         
    
        
            | 
                10/26/2011
             | 
            
                -0.30 / -6.00%
             |             
            
                4.90
             |           
            
                5.00
             |               
            
                4.70
             |                           
            
                4.70
             | 
            
                4.92
             |                     
            
                4.04
             |                                 
            
                99,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/25/2011
             | 
            
                -0.30 / -5.66%
             |             
            
                5.00
             |           
            
                5.00
             |               
            
                5.00
             |                           
            
                5.00
             | 
            
                5.00
             |                     
            
                4.29
             |                                 
            
                3,700
             |            
            
                 
             |                                       
         
    
        
            | 
                10/24/2011
             | 
            
                -0.30 / -5.36%
             |             
            
                5.30
             |           
            
                5.30
             |               
            
                5.30
             |                           
            
                5.30
             | 
            
                5.30
             |                     
            
                4.55
             |                                 
            
                100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/21/2011
             | 
            
                -0.20 / -3.45%
             |             
            
                5.60
             |           
            
                5.60
             |               
            
                5.60
             |                           
            
                5.60
             | 
            
                5.60
             |                     
            
                4.81
             |                                 
            
                300
             |            
            
                 
             |                                       
         
    
        
            | 
                10/20/2011
             | 
            
                +0.30 / +5.45%
             |             
            
                5.80
             |           
            
                5.80
             |               
            
                5.80
             |                           
            
                5.80
             | 
            
                5.80
             |                     
            
                4.98
             |                                 
            
                0
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/19/2011
             | 
            
                +0.10 / +1.85%
             |             
            
                5.90
             |           
            
                5.90
             |               
            
                5.50
             |                           
            
                5.50
             | 
            
                5.83
             |                     
            
                4.72
             |                                 
            
                42,600
             |            
            
                 
             |                                       
         
    
        
            | 
                10/18/2011
             | 
            
                -0.40 / -6.90%
             |             
            
                5.90
             |           
            
                5.90
             |               
            
                5.40
             |                           
            
                5.40
             | 
            
                5.86
             |                     
            
                4.64
             |                                 
            
                38,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/17/2011
             | 
            
                +0.40 / +7.41%
             |             
            
                5.80
             |           
            
                5.80
             |               
            
                5.80
             |                           
            
                5.80
             | 
            
                5.80
             |                     
            
                4.98
             |                                 
            
                0
             |            
            
                 
             |                                       
         
    
        
            | 
                10/14/2011
             | 
            
                -0.10 / -1.82%
             |             
            
                5.60
             |           
            
                5.90
             |               
            
                5.40
             |                           
            
                5.40
             | 
            
                5.78
             |                     
            
                4.64
             |                                 
            
                94,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/13/2011
             | 
            
                -0.40 / -6.78%
             |             
            
                5.50
             |           
            
                5.70
             |               
            
                5.50
             |                           
            
                5.50
             | 
            
                5.68
             |                     
            
                4.72
             |                                 
            
                67,300
             |            
            
                 
             |                                       
         
    
        
            | 
                10/12/2011
             | 
            
                0.00 / 0.00%
             |             
            
                5.90
             |           
            
                5.90
             |               
            
                5.90
             |                           
            
                5.90
             | 
            
                5.90
             |                     
            
                5.07
             |                                 
            
                100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/11/2011
             | 
            
                -0.30 / -4.84%
             |             
            
                6.50
             |           
            
                6.50
             |               
            
                5.90
             |                           
            
                5.90
             | 
            
                6.35
             |                     
            
                5.07
             |                                 
            
                45,600
             |            
            
                 
             |                                       
         
    
        
            | 
                10/10/2011
             | 
            
                0.00 / 0.00%
             |             
            
                6.40
             |           
            
                6.40
             |               
            
                6.20
             |                           
            
                6.20
             | 
            
                6.32
             |                     
            
                5.32
             |                                 
            
                50,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/7/2011
             | 
            
                -0.20 / -3.13%
             |             
            
                6.60
             |           
            
                6.70
             |               
            
                6.20
             |                           
            
                6.20
             | 
            
                6.62
             |                     
            
                5.32
             |                                 
            
                127,700
             |            
            
                 
             |                                       
         
    
        
            | 
                10/6/2011
             | 
            
                +0.10 / +1.59%
             |             
            
                6.70
             |           
            
                6.70
             |               
            
                6.40
             |                           
            
                6.40
             | 
            
                6.60
             |                     
            
                5.50
             |                                 
            
                196,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/5/2011
             | 
            
                -0.30 / -4.55%
             |             
            
                6.70
             |           
            
                6.90
             |               
            
                6.30
             |                           
            
                6.30
             | 
            
                6.77
             |                     
            
                5.41
             |                                 
            
                179,700
             |            
            
                 
             |                                       
         
    
        
            | 
                10/4/2011
             | 
            
                -0.20 / -2.94%
             |             
            
                6.70
             |           
            
                6.70
             |               
            
                6.60
             |                           
            
                6.60
             | 
            
                6.65
             |                     
            
                5.67
             |                                 
            
                154,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/3/2011
             | 
            
                -0.40 / -5.56%
             |             
            
                7.30
             |           
            
                7.30
             |               
            
                6.80
             |                           
            
                6.80
             | 
            
                7.04
             |                     
            
                5.84
             |                                 
            
                40,300
             |            
            
                 
             |                                       
         
    
        
            | 
                9/30/2011
             | 
            
                +0.30 / +4.35%
             |             
            
                7.50
             |           
            
                7.50
             |               
            
                7.00
             |                           
            
                7.20
             | 
            
                7.32
             |                     
            
                6.18
             |                                 
            
                202,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/29/2011
             | 
            
                -0.40 / -5.48%
             |             
            
                7.70
             |           
            
                7.70
             |               
            
                6.90
             |                           
            
                6.90
             | 
            
                7.51
             |                     
            
                5.93
             |                                 
            
                133,200
             |            
            
                 
             |                                       
         
    
        
            | 
                9/28/2011
             | 
            
                0.00 / 0.00%
             |             
            
                7.80
             |           
            
                7.80
             |               
            
                7.30
             |                           
            
                7.30
             | 
            
                7.44
             |                     
            
                6.27
             |                                 
            
                187,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/27/2011
             | 
            
                +0.20 / +2.82%
             |             
            
                7.90
             |           
            
                7.90
             |               
            
                7.30
             |                           
            
                7.30
             | 
            
                7.76
             |                     
            
                6.27
             |                                 
            
                102,000
             |            
            
                 
             |                                       
         
    
        
            | 
                9/26/2011
             | 
            
                -0.80 / -10.13%
             |             
            
                7.90
             |           
            
                8.00
             |               
            
                7.10
             |                           
            
                7.10
             | 
            
                7.79
             |                     
            
                6.10
             |                                 
            
                223,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/23/2011
             | 
            
                +0.40 / +5.33%
             |             
            
                7.80
             |           
            
                7.90
             |               
            
                7.70
             |                           
            
                7.90
             | 
            
                7.83
             |                     
            
                6.78
             |                                 
            
                237,700
             |            
            
                 
             |                                       
         
    
        
            | 
                9/22/2011
             | 
            
                +0.50 / +7.14%
             |             
            
                7.50
             |           
            
                7.50
             |               
            
                7.30
             |                           
            
                7.50
             | 
            
                7.42
             |                     
            
                6.44
             |                                 
            
                142,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/21/2011
             | 
            
                +0.20 / +2.94%
             |             
            
                7.10
             |           
            
                7.20
             |               
            
                6.90
             |                           
            
                7.00
             | 
            
                7.07
             |                     
            
                6.01
             |                                 
            
                141,300
             |            
            
                 
             |                                       
         
    
        
            | 
                9/20/2011
             | 
            
                +0.30 / +4.62%
             |             
            
                6.70
             |           
            
                6.80
             |               
            
                6.60
             |                           
            
                6.80
             | 
            
                6.76
             |                     
            
                5.84
             |                                 
            
                108,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/19/2011
             | 
            
                +0.20 / +3.17%
             |             
            
                6.20
             |           
            
                6.50
             |               
            
                6.20
             |                           
            
                6.50
             | 
            
                6.41
             |                     
            
                5.58
             |                                 
            
                79,200
             |            
            
                 
             |                                       
         
    
        
            | 
                9/16/2011
             | 
            
                -0.10 / -1.56%
             |             
            
                6.60
             |           
            
                6.60
             |               
            
                6.00
             |                           
            
                6.30
             | 
            
                6.14
             |                     
            
                5.41
             |                                 
            
                2,600
             |  
            
                 
             |                                                              
             
    
         
    
    
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