| 
                 
                    Closing price on 12/15/2014
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    11.20 | 
                 
                
                    | High | 
                    11.40 | 
                 
                
                    | Low | 
                    11.20 | 
                     
                
                    | Volume | 
                    143,200 | 
                                 
                
                    | Split-adjusted Price | 
                    9.79 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
IVS Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                12/15/2014
             | 
            
                +0.20 / +1.79%
             |             
            
                11.20
             |           
            
                11.40
             |               
            
                11.20
             |                           
            
                11.40
             | 
            
                11.27
             |                     
            
                9.79
             |                                 
            
                143,200
             |            
            
                 
             |                                       
         
    
        
            | 
                12/12/2014
             | 
            
                +0.10 / +0.90%
             |             
            
                11.10
             |           
            
                11.30
             |               
            
                11.10
             |                           
            
                11.20
             | 
            
                11.28
             |                     
            
                9.62
             |                                 
            
                171,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/11/2014
             | 
            
                -0.30 / -2.63%
             |             
            
                11.30
             |           
            
                11.40
             |               
            
                11.10
             |                           
            
                11.10
             | 
            
                11.26
             |                     
            
                9.53
             |                                 
            
                145,300
             |            
            
                 
             |                                       
         
    
        
            | 
                12/10/2014
             | 
            
                +0.30 / +2.70%
             |             
            
                11.30
             |           
            
                11.40
             |               
            
                11.10
             |                           
            
                11.40
             | 
            
                11.28
             |                     
            
                9.79
             |                                 
            
                78,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/9/2014
             | 
            
                -0.40 / -3.48%
             |             
            
                11.50
             |           
            
                11.50
             |               
            
                11.10
             |                           
            
                11.10
             | 
            
                11.33
             |                     
            
                9.53
             |                                 
            
                168,500
             |            
            
                 
             |                                       
         
    
        
            | 
                12/8/2014
             | 
            
                -0.10 / -0.86%
             |             
            
                11.80
             |           
            
                12.00
             |               
            
                11.50
             |                           
            
                11.50
             | 
            
                11.76
             |                     
            
                9.88
             |                                 
            
                139,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/5/2014
             | 
            
                -0.10 / -0.85%
             |             
            
                11.70
             |           
            
                11.90
             |               
            
                11.60
             |                           
            
                11.60
             | 
            
                11.80
             |                     
            
                9.96
             |                                 
            
                332,000
             |            
            
                 
             |                                       
         
    
        
            | 
                12/4/2014
             | 
            
                -0.10 / -0.85%
             |             
            
                11.80
             |           
            
                11.90
             |               
            
                11.60
             |                           
            
                11.70
             | 
            
                11.76
             |                     
            
                10.05
             |                                 
            
                149,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/3/2014
             | 
            
                0.00 / 0.00%
             |             
            
                11.80
             |           
            
                12.10
             |               
            
                11.70
             |                           
            
                11.80
             | 
            
                11.90
             |                     
            
                10.13
             |                                 
            
                563,100
             |            
            
                 
             |                                       
         
    
        
            | 
                12/2/2014
             | 
            
                +0.20 / +1.72%
             |             
            
                11.60
             |           
            
                11.90
             |               
            
                11.60
             |                           
            
                11.80
             | 
            
                11.72
             |                     
            
                10.13
             |                                 
            
                578,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/1/2014
             | 
            
                +0.30 / +2.65%
             |             
            
                11.30
             |           
            
                12.30
             |               
            
                11.30
             |                           
            
                11.60
             | 
            
                11.70
             |                     
            
                9.96
             |                                 
            
                207,000
             |            
            
                 
             |                                       
         
    
        
            | 
                11/28/2014
             | 
            
                +1.00 / +9.71%
             |             
            
                10.40
             |           
            
                11.30
             |               
            
                10.30
             |                           
            
                11.30
             | 
            
                10.77
             |                     
            
                9.70
             |                                 
            
                250,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/27/2014
             | 
            
                +0.10 / +0.98%
             |             
            
                10.30
             |           
            
                10.30
             |               
            
                10.10
             |                           
            
                10.30
             | 
            
                10.22
             |                     
            
                8.84
             |                                 
            
                218,400
             |            
            
                 
             |                                       
         
    
        
            | 
                11/26/2014
             | 
            
                -0.30 / -2.86%
             |             
            
                10.30
             |           
            
                10.50
             |               
            
                10.10
             |                           
            
                10.20
             | 
            
                10.21
             |                     
            
                8.76
             |                                 
            
                484,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/25/2014
             | 
            
                0.00 / 0.00%
             |             
            
                10.30
             |           
            
                10.60
             |               
            
                10.30
             |                           
            
                10.50
             | 
            
                10.47
             |                     
            
                9.02
             |                                 
            
                198,500
             |            
            
                 
             |                                       
         
    
        
            | 
                11/24/2014
             | 
            
                0.00 / 0.00%
             |             
            
                10.40
             |           
            
                10.80
             |               
            
                10.20
             |                           
            
                10.50
             | 
            
                10.46
             |                     
            
                9.02
             |                                 
            
                284,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/21/2014
             | 
            
                -0.90 / -7.89%
             |             
            
                11.40
             |           
            
                11.40
             |               
            
                10.50
             |                           
            
                10.50
             | 
            
                11.02
             |                     
            
                9.02
             |                                 
            
                315,300
             |            
            
                 
             |                                       
         
    
        
            | 
                11/20/2014
             | 
            
                -0.20 / -1.72%
             |             
            
                11.60
             |           
            
                11.80
             |               
            
                10.50
             |                           
            
                11.40
             | 
            
                11.60
             |                     
            
                9.79
             |                                 
            
                459,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/19/2014
             | 
            
                +0.40 / +3.57%
             |             
            
                11.00
             |           
            
                11.80
             |               
            
                11.00
             |                           
            
                11.60
             | 
            
                11.57
             |                     
            
                9.96
             |                                 
            
                358,400
             |            
            
                 
             |                                       
         
    
        
            | 
                11/18/2014
             | 
            
                -0.80 / -6.67%
             |             
            
                12.00
             |           
            
                12.00
             |               
            
                11.20
             |                           
            
                11.20
             | 
            
                11.58
             |                     
            
                9.62
             |                                 
            
                326,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/17/2014
             | 
            
                -0.40 / -3.23%
             |             
            
                12.40
             |           
            
                12.40
             |               
            
                11.80
             |                           
            
                12.00
             | 
            
                12.01
             |                     
            
                10.30
             |                                 
            
                134,900
             |            
            
                 
             |                                       
         
    
        
            | 
                11/14/2014
             | 
            
                -0.20 / -1.59%
             |             
            
                12.40
             |           
            
                12.60
             |               
            
                11.50
             |                           
            
                12.40
             | 
            
                11.75
             |                     
            
                10.65
             |                                 
            
                735,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/13/2014
             | 
            
                +0.40 / +3.28%
             |             
            
                12.20
             |           
            
                12.70
             |               
            
                12.20
             |                           
            
                12.60
             | 
            
                12.47
             |                     
            
                10.82
             |                                 
            
                309,000
             |            
            
                 
             |                                       
         
    
        
            | 
                11/12/2014
             | 
            
                -0.40 / -3.17%
             |             
            
                12.60
             |           
            
                12.70
             |               
            
                12.20
             |                           
            
                12.20
             | 
            
                12.50
             |                     
            
                10.48
             |                                 
            
                306,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/11/2014
             | 
            
                -0.40 / -3.08%
             |             
            
                13.00
             |           
            
                13.10
             |               
            
                12.60
             |                           
            
                12.60
             | 
            
                12.89
             |                     
            
                10.82
             |                                 
            
                446,100
             |            
            
                 
             |                                       
         
    
        
            | 
                11/10/2014
             | 
            
                -0.30 / -2.26%
             |             
            
                13.30
             |           
            
                13.50
             |               
            
                12.30
             |                           
            
                13.00
             | 
            
                13.14
             |                     
            
                11.16
             |                                 
            
                928,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/7/2014
             | 
            
                +0.20 / +1.53%
             |             
            
                13.10
             |           
            
                13.60
             |               
            
                13.10
             |                           
            
                13.30
             | 
            
                13.39
             |                     
            
                11.42
             |                                 
            
                685,200
             |            
            
                 
             |                                       
         
    
        
            | 
                11/6/2014
             | 
            
                0.00 / 0.00%
             |             
            
                13.10
             |           
            
                13.50
             |               
            
                13.00
             |                           
            
                13.10
             | 
            
                13.21
             |                     
            
                11.25
             |                                 
            
                546,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/5/2014
             | 
            
                -0.10 / -0.76%
             |             
            
                13.20
             |           
            
                13.20
             |               
            
                12.70
             |                           
            
                13.10
             | 
            
                13.02
             |                     
            
                11.25
             |                                 
            
                303,700
             |            
            
                 
             |                                       
         
    
        
            | 
                11/4/2014
             | 
            
                +0.70 / +5.60%
             |             
            
                12.60
             |           
            
                13.70
             |               
            
                12.50
             |                           
            
                13.20
             | 
            
                13.20
             |                     
            
                11.33
             |                                 
            
                815,600
             |  
            
                 
             |                                                              
             
    
         
    
    
 |