| 
                 
                    Closing price on 3/21/2014
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    11.50 | 
                 
                
                    | High | 
                    11.90 | 
                 
                
                    | Low | 
                    11.40 | 
                     
                
                    | Volume | 
                    454,400 | 
                                 
                
                    | Split-adjusted Price | 
                    9.96 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
IVS Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                3/21/2014
             | 
            
                +0.20 / +1.75%
             |             
            
                11.50
             |           
            
                11.90
             |               
            
                11.40
             |                           
            
                11.60
             | 
            
                11.65
             |                     
            
                9.96
             |                                 
            
                454,400
             |            
            
                 
             |                                       
         
    
        
            | 
                3/20/2014
             | 
            
                +1.00 / +9.62%
             |             
            
                10.50
             |           
            
                11.40
             |               
            
                10.50
             |                           
            
                11.40
             | 
            
                11.32
             |                     
            
                9.79
             |                                 
            
                535,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/19/2014
             | 
            
                +0.90 / +9.47%
             |             
            
                9.50
             |           
            
                10.40
             |               
            
                9.40
             |                           
            
                10.40
             | 
            
                10.20
             |                     
            
                8.93
             |                                 
            
                1,026,000
             |            
            
                 
             |                                       
         
    
        
            | 
                3/18/2014
             | 
            
                +0.10 / +1.06%
             |             
            
                9.40
             |           
            
                9.70
             |               
            
                9.30
             |                           
            
                9.50
             | 
            
                9.45
             |                     
            
                8.16
             |                                 
            
                609,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/17/2014
             | 
            
                +0.80 / +9.30%
             |             
            
                8.60
             |           
            
                9.40
             |               
            
                8.60
             |                           
            
                9.40
             | 
            
                9.17
             |                     
            
                8.07
             |                                 
            
                591,500
             |            
            
                 
             |                                       
         
    
        
            | 
                3/14/2014
             | 
            
                +0.30 / +3.61%
             |             
            
                8.30
             |           
            
                8.70
             |               
            
                8.20
             |                           
            
                8.60
             | 
            
                8.48
             |                     
            
                7.38
             |                                 
            
                388,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/13/2014
             | 
            
                +0.50 / +6.41%
             |             
            
                7.80
             |           
            
                8.50
             |               
            
                7.70
             |                           
            
                8.30
             | 
            
                8.10
             |                     
            
                7.13
             |                                 
            
                996,300
             |            
            
                 
             |                                       
         
    
        
            | 
                3/12/2014
             | 
            
                +0.10 / +1.30%
             |             
            
                7.70
             |           
            
                7.80
             |               
            
                7.70
             |                           
            
                7.80
             | 
            
                7.74
             |                     
            
                6.70
             |                                 
            
                239,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/11/2014
             | 
            
                +0.20 / +2.67%
             |             
            
                7.50
             |           
            
                7.70
             |               
            
                7.50
             |                           
            
                7.70
             | 
            
                7.60
             |                     
            
                6.61
             |                                 
            
                237,700
             |            
            
                 
             |                                       
         
    
        
            | 
                3/10/2014
             | 
            
                +0.30 / +4.17%
             |             
            
                7.20
             |           
            
                7.70
             |               
            
                7.20
             |                           
            
                7.50
             | 
            
                7.33
             |                     
            
                6.44
             |                                 
            
                479,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/7/2014
             | 
            
                0.00 / 0.00%
             |             
            
                7.20
             |           
            
                7.20
             |               
            
                7.10
             |                           
            
                7.20
             | 
            
                7.18
             |                     
            
                6.18
             |                                 
            
                96,400
             |            
            
                 
             |                                       
         
    
        
            | 
                3/6/2014
             | 
            
                +0.10 / +1.41%
             |             
            
                7.10
             |           
            
                7.20
             |               
            
                7.10
             |                           
            
                7.20
             | 
            
                7.11
             |                     
            
                6.18
             |                                 
            
                182,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/5/2014
             | 
            
                +0.20 / +2.90%
             |             
            
                6.90
             |           
            
                7.10
             |               
            
                6.80
             |                           
            
                7.10
             | 
            
                6.93
             |                     
            
                6.10
             |                                 
            
                191,200
             |            
            
                 
             |                                       
         
    
        
            | 
                3/4/2014
             | 
            
                0.00 / 0.00%
             |             
            
                6.90
             |           
            
                6.90
             |               
            
                6.80
             |                           
            
                6.90
             | 
            
                6.88
             |                     
            
                5.93
             |                                 
            
                61,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/3/2014
             | 
            
                -0.10 / -1.43%
             |             
            
                7.00
             |           
            
                7.00
             |               
            
                6.80
             |                           
            
                6.90
             | 
            
                6.87
             |                     
            
                5.93
             |                                 
            
                239,700
             |            
            
                 
             |                                       
         
    
        
            | 
                2/28/2014
             | 
            
                0.00 / 0.00%
             |             
            
                7.00
             |           
            
                7.00
             |               
            
                6.90
             |                           
            
                7.00
             | 
            
                7.00
             |                     
            
                6.01
             |                                 
            
                54,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/27/2014
             | 
            
                -0.10 / -1.41%
             |             
            
                7.10
             |           
            
                7.20
             |               
            
                6.90
             |                           
            
                7.00
             | 
            
                7.02
             |                     
            
                6.01
             |                                 
            
                306,900
             |            
            
                 
             |                                       
         
    
        
            | 
                2/26/2014
             | 
            
                -0.10 / -1.39%
             |             
            
                7.20
             |           
            
                7.20
             |               
            
                7.10
             |                           
            
                7.10
             | 
            
                7.13
             |                     
            
                6.10
             |                                 
            
                121,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/25/2014
             | 
            
                0.00 / 0.00%
             |             
            
                7.20
             |           
            
                7.30
             |               
            
                7.10
             |                           
            
                7.20
             | 
            
                7.17
             |                     
            
                6.18
             |                                 
            
                216,700
             |            
            
                 
             |                                       
         
    
        
            | 
                2/24/2014
             | 
            
                +0.10 / +1.41%
             |             
            
                7.10
             |           
            
                7.30
             |               
            
                7.00
             |                           
            
                7.20
             | 
            
                7.17
             |                     
            
                6.18
             |                                 
            
                999,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/21/2014
             | 
            
                +0.10 / +1.43%
             |             
            
                7.00
             |           
            
                7.20
             |               
            
                7.00
             |                           
            
                7.10
             | 
            
                7.10
             |                     
            
                6.10
             |                                 
            
                248,000
             |            
            
                 
             |                                       
         
    
        
            | 
                2/20/2014
             | 
            
                -0.20 / -2.78%
             |             
            
                7.20
             |           
            
                7.30
             |               
            
                6.90
             |                           
            
                7.00
             | 
            
                7.06
             |                     
            
                6.01
             |                                 
            
                565,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/19/2014
             | 
            
                0.00 / 0.00%
             |             
            
                7.20
             |           
            
                7.20
             |               
            
                7.00
             |                           
            
                7.20
             | 
            
                7.07
             |                     
            
                6.18
             |                                 
            
                1,015,700
             |            
            
                 
             |                                       
         
    
        
            | 
                2/18/2014
             | 
            
                0.00 / 0.00%
             |             
            
                7.20
             |           
            
                7.20
             |               
            
                7.10
             |                           
            
                7.20
             | 
            
                7.14
             |                     
            
                6.18
             |                                 
            
                204,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/17/2014
             | 
            
                +0.20 / +2.86%
             |             
            
                7.00
             |           
            
                7.20
             |               
            
                7.00
             |                           
            
                7.20
             | 
            
                7.08
             |                     
            
                6.18
             |                                 
            
                223,700
             |            
            
                 
             |                                       
         
    
        
            | 
                2/14/2014
             | 
            
                +0.30 / +4.48%
             |             
            
                6.70
             |           
            
                7.00
             |               
            
                6.70
             |                           
            
                7.00
             | 
            
                6.84
             |                     
            
                6.01
             |                                 
            
                336,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/13/2014
             | 
            
                +0.20 / +3.08%
             |             
            
                6.50
             |           
            
                7.00
             |               
            
                6.50
             |                           
            
                6.70
             | 
            
                6.62
             |                     
            
                5.75
             |                                 
            
                309,500
             |            
            
                 
             |                                       
         
    
        
            | 
                2/12/2014
             | 
            
                +0.20 / +3.17%
             |             
            
                6.30
             |           
            
                6.50
             |               
            
                6.30
             |                           
            
                6.50
             | 
            
                6.33
             |                     
            
                5.58
             |                                 
            
                213,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/11/2014
             | 
            
                +0.10 / +1.61%
             |             
            
                6.20
             |           
            
                6.40
             |               
            
                6.20
             |                           
            
                6.30
             | 
            
                6.26
             |                     
            
                5.41
             |                                 
            
                141,900
             |            
            
                 
             |                                       
         
    
        
            | 
                2/10/2014
             | 
            
                0.00 / 0.00%
             |             
            
                6.20
             |           
            
                6.20
             |               
            
                6.10
             |                           
            
                6.20
             | 
            
                6.20
             |                     
            
                5.32
             |                                 
            
                82,000
             |  
            
                 
             |                                                              
             
    
         
    
    
 |