| 
                 
                    Closing price on 5/8/2014
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    8.00 | 
                 
                
                    | High | 
                    8.00 | 
                 
                
                    | Low | 
                    7.30 | 
                     
                
                    | Volume | 
                    415,700 | 
                                 
                
                    | Split-adjusted Price | 
                    6.27 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
IVS Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                5/8/2014
             | 
            
                -0.80 / -9.88%
             |             
            
                8.00
             |           
            
                8.00
             |               
            
                7.30
             |                           
            
                7.30
             | 
            
                7.49
             |                     
            
                6.27
             |                                 
            
                415,700
             |            
            
                 
             |                                       
         
    
        
            | 
                5/7/2014
             | 
            
                0.00 / 0.00%
             |             
            
                8.10
             |           
            
                8.30
             |               
            
                8.10
             |                           
            
                8.10
             | 
            
                8.17
             |                     
            
                6.96
             |                                 
            
                241,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/6/2014
             | 
            
                -0.50 / -5.81%
             |             
            
                8.50
             |           
            
                8.50
             |               
            
                7.80
             |                           
            
                8.10
             | 
            
                8.10
             |                     
            
                6.96
             |                                 
            
                353,200
             |            
            
                 
             |                                       
         
    
        
            | 
                5/5/2014
             | 
            
                -0.60 / -6.52%
             |             
            
                9.20
             |           
            
                9.20
             |               
            
                8.50
             |                           
            
                8.60
             | 
            
                8.86
             |                     
            
                7.38
             |                                 
            
                270,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/29/2014
             | 
            
                0.00 / 0.00%
             |             
            
                9.20
             |           
            
                9.20
             |               
            
                9.00
             |                           
            
                9.20
             | 
            
                9.10
             |                     
            
                7.90
             |                                 
            
                137,000
             |            
            
                 
             |                                       
         
    
        
            | 
                4/28/2014
             | 
            
                -0.10 / -1.08%
             |             
            
                9.30
             |           
            
                9.30
             |               
            
                9.10
             |                           
            
                9.20
             | 
            
                9.19
             |                     
            
                7.90
             |                                 
            
                117,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/25/2014
             | 
            
                0.00 / 0.00%
             |             
            
                9.30
             |           
            
                9.40
             |               
            
                9.20
             |                           
            
                9.30
             | 
            
                9.30
             |                     
            
                7.99
             |                                 
            
                115,000
             |            
            
                 
             |                                       
         
    
        
            | 
                4/24/2014
             | 
            
                0.00 / 0.00%
             |             
            
                9.30
             |           
            
                9.30
             |               
            
                9.20
             |                           
            
                9.30
             | 
            
                9.24
             |                     
            
                7.99
             |                                 
            
                88,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/23/2014
             | 
            
                0.00 / 0.00%
             |             
            
                9.30
             |           
            
                9.40
             |               
            
                9.20
             |                           
            
                9.30
             | 
            
                9.31
             |                     
            
                7.99
             |                                 
            
                262,000
             |            
            
                 
             |                                       
         
    
        
            | 
                4/22/2014
             | 
            
                +0.60 / +6.90%
             |             
            
                8.80
             |           
            
                9.30
             |               
            
                8.80
             |                           
            
                9.30
             | 
            
                9.03
             |                     
            
                7.99
             |                                 
            
                497,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/21/2014
             | 
            
                -0.10 / -1.14%
             |             
            
                8.90
             |           
            
                9.00
             |               
            
                8.60
             |                           
            
                8.70
             | 
            
                8.77
             |                     
            
                7.47
             |                                 
            
                269,400
             |            
            
                 
             |                                       
         
    
        
            | 
                4/18/2014
             | 
            
                -0.50 / -5.38%
             |             
            
                9.10
             |           
            
                9.20
             |               
            
                8.80
             |                           
            
                8.80
             | 
            
                8.97
             |                     
            
                7.56
             |                                 
            
                174,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/17/2014
             | 
            
                +0.70 / +8.14%
             |             
            
                8.60
             |           
            
                9.30
             |               
            
                8.60
             |                           
            
                9.30
             | 
            
                8.97
             |                     
            
                7.99
             |                                 
            
                463,800
             |            
            
                 
             |                                       
         
    
        
            | 
                4/16/2014
             | 
            
                -0.60 / -6.52%
             |             
            
                9.20
             |           
            
                9.20
             |               
            
                8.40
             |                           
            
                8.60
             | 
            
                8.83
             |                     
            
                7.38
             |                                 
            
                307,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/15/2014
             | 
            
                -0.30 / -3.16%
             |             
            
                9.50
             |           
            
                9.50
             |               
            
                9.20
             |                           
            
                9.20
             | 
            
                9.32
             |                     
            
                7.90
             |                                 
            
                268,800
             |            
            
                 
             |                                       
         
    
        
            | 
                4/14/2014
             | 
            
                -0.40 / -4.04%
             |             
            
                10.00
             |           
            
                10.00
             |               
            
                9.30
             |                           
            
                9.50
             | 
            
                9.63
             |                     
            
                8.16
             |                                 
            
                260,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/11/2014
             | 
            
                -0.50 / -4.81%
             |             
            
                10.40
             |           
            
                10.40
             |               
            
                9.90
             |                           
            
                9.90
             | 
            
                10.10
             |                     
            
                8.50
             |                                 
            
                687,000
             |            
            
                 
             |                                       
         
    
        
            | 
                4/10/2014
             | 
            
                0.00 / 0.00%
             |             
            
                10.50
             |           
            
                10.50
             |               
            
                10.30
             |                           
            
                10.40
             | 
            
                10.41
             |                     
            
                8.93
             |                                 
            
                224,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/8/2014
             | 
            
                0.00 / 0.00%
             |             
            
                10.40
             |           
            
                10.50
             |               
            
                10.30
             |                           
            
                10.40
             | 
            
                10.41
             |                     
            
                8.93
             |                                 
            
                321,700
             |            
            
                 
             |                                       
         
    
        
            | 
                4/7/2014
             | 
            
                +0.40 / +4.00%
             |             
            
                10.00
             |           
            
                10.40
             |               
            
                10.00
             |                           
            
                10.40
             | 
            
                10.25
             |                     
            
                8.93
             |                                 
            
                377,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/4/2014
             | 
            
                0.00 / 0.00%
             |             
            
                10.00
             |           
            
                10.00
             |               
            
                9.70
             |                           
            
                10.00
             | 
            
                9.88
             |                     
            
                8.59
             |                                 
            
                229,200
             |            
            
                 
             |                                       
         
    
        
            | 
                4/3/2014
             | 
            
                +0.50 / +5.26%
             |             
            
                9.60
             |           
            
                10.00
             |               
            
                9.60
             |                           
            
                10.00
             | 
            
                9.70
             |                     
            
                8.59
             |                                 
            
                69,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/2/2014
             | 
            
                -0.40 / -4.04%
             |             
            
                9.90
             |           
            
                9.90
             |               
            
                9.20
             |                           
            
                9.50
             | 
            
                9.55
             |                     
            
                8.16
             |                                 
            
                146,400
             |            
            
                 
             |                                       
         
    
        
            | 
                4/1/2014
             | 
            
                -0.40 / -3.88%
             |             
            
                10.30
             |           
            
                10.30
             |               
            
                9.70
             |                           
            
                9.90
             | 
            
                9.98
             |                     
            
                8.50
             |                                 
            
                110,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/31/2014
             | 
            
                0.00 / 0.00%
             |             
            
                10.40
             |           
            
                10.50
             |               
            
                10.20
             |                           
            
                10.30
             | 
            
                10.34
             |                     
            
                8.84
             |                                 
            
                231,800
             |            
            
                 
             |                                       
         
    
        
            | 
                3/28/2014
             | 
            
                +0.20 / +1.98%
             |             
            
                10.10
             |           
            
                10.40
             |               
            
                9.90
             |                           
            
                10.30
             | 
            
                10.19
             |                     
            
                8.84
             |                                 
            
                214,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/27/2014
             | 
            
                0.00 / 0.00%
             |             
            
                10.10
             |           
            
                10.20
             |               
            
                9.30
             |                           
            
                10.10
             | 
            
                9.53
             |                     
            
                8.67
             |                                 
            
                306,700
             |            
            
                 
             |                                       
         
    
        
            | 
                3/26/2014
             | 
            
                -1.10 / -9.82%
             |             
            
                11.20
             |           
            
                11.20
             |               
            
                10.10
             |                           
            
                10.10
             | 
            
                10.62
             |                     
            
                8.67
             |                                 
            
                552,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/25/2014
             | 
            
                -0.40 / -3.45%
             |             
            
                11.60
             |           
            
                11.60
             |               
            
                11.20
             |                           
            
                11.20
             | 
            
                11.46
             |                     
            
                9.62
             |                                 
            
                660,800
             |            
            
                 
             |                                       
         
    
        
            | 
                3/24/2014
             | 
            
                0.00 / 0.00%
             |             
            
                11.60
             |           
            
                11.80
             |               
            
                11.50
             |                           
            
                11.60
             | 
            
                11.58
             |                     
            
                9.96
             |                                 
            
                906,000
             |  
            
                 
             |                                                              
             
    
         
    
    
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