| 
    
        
            | 
                    Closing price on 12/19/2019
                 |  |  
    
        |           
                
                    | Open | 1.64 |  
                    | High | 1.66 |  
                    | Low | 1.63 |  
                    | Volume | 50,020 |  
                    | Split-adjusted Price | 1.54 |  
                
             | 
 |  VOS Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 12/19/2019 | -0.01 / -0.60% | 1.64 | 1.66 | 1.63 | 1.65 | 1.64 | 1.54 | 50,020 |   |  
            | 12/18/2019 | +0.01 / +0.61% | 1.63 | 1.68 | 1.63 | 1.66 | 1.66 | 1.55 | 102,780 |   |  			
            | 12/17/2019 | -0.02 / -1.20% | 1.67 | 1.67 | 1.60 | 1.65 | 1.62 | 1.54 | 96,130 |   |  
            | 12/16/2019 | -0.01 / -0.60% | 1.68 | 1.68 | 1.61 | 1.67 | 1.64 | 1.55 | 19,530 |   |  			
            | 12/13/2019 | +0.03 / +1.82% | 1.65 | 1.69 | 1.65 | 1.68 | 1.67 | 1.56 | 5,640 |   |  
            | 12/12/2019 | +0.03 / +1.85% | 1.64 | 1.70 | 1.63 | 1.65 | 1.66 | 1.54 | 12,870 |   |  			
            | 12/11/2019 | 0.00 / 0.00% | 1.63 | 1.63 | 1.62 | 1.62 | 1.63 | 1.51 | 15,840 |   |  
            | 12/10/2019 | -0.02 / -1.22% | 1.60 | 1.65 | 1.58 | 1.62 | 1.61 | 1.51 | 140,010 |   |  			
            | 12/9/2019 | 0.00 / 0.00% | 1.64 | 1.64 | 1.60 | 1.64 | 1.63 | 1.53 | 53,910 |   |  
            | 12/6/2019 | +0.02 / +1.23% | 1.64 | 1.64 | 1.60 | 1.64 | 1.62 | 1.53 | 43,190 |   |  			
            | 12/5/2019 | -0.03 / -1.82% | 1.65 | 1.65 | 1.61 | 1.62 | 1.62 | 1.51 | 90,260 |   |  
            | 12/4/2019 | -0.02 / -1.20% | 1.67 | 1.67 | 1.60 | 1.65 | 1.61 | 1.54 | 34,150 |   |  			
            | 12/3/2019 | +0.02 / +1.21% | 1.67 | 1.67 | 1.60 | 1.67 | 1.61 | 1.55 | 20,470 |   |  
            | 12/2/2019 | 0.00 / 0.00% | 1.74 | 1.74 | 1.64 | 1.65 | 1.67 | 1.54 | 80,740 |   |  			
            | 11/29/2019 | -0.12 / -6.78% | 1.74 | 1.75 | 1.65 | 1.65 | 1.66 | 1.54 | 325,500 |   |  
            | 11/28/2019 | +0.08 / +4.73% | 1.69 | 1.77 | 1.66 | 1.77 | 1.69 | 1.65 | 77,390 |   |  			
            | 11/27/2019 | -0.05 / -2.87% | 1.74 | 1.77 | 1.66 | 1.69 | 1.68 | 1.57 | 76,200 |   |  
            | 11/26/2019 | -0.02 / -1.14% | 1.75 | 1.75 | 1.66 | 1.74 | 1.67 | 1.62 | 74,120 |   |  			
            | 11/25/2019 | +0.01 / +0.57% | 1.74 | 1.76 | 1.68 | 1.76 | 1.71 | 1.64 | 22,770 |   |  
            | 11/22/2019 | 0.00 / 0.00% | 1.68 | 1.79 | 1.68 | 1.75 | 1.73 | 1.63 | 3,080 |   |  			
            | 11/21/2019 | -0.05 / -2.78% | 1.75 | 1.80 | 1.70 | 1.75 | 1.71 | 1.63 | 45,010 |   |  
            | 11/20/2019 | +0.05 / +2.86% | 1.68 | 1.84 | 1.68 | 1.80 | 1.75 | 1.68 | 64,420 |   |  			
            | 11/19/2019 | -0.05 / -2.78% | 1.80 | 1.82 | 1.74 | 1.75 | 1.77 | 1.63 | 64,950 |   |  
            | 11/18/2019 | -0.04 / -2.17% | 1.85 | 1.87 | 1.79 | 1.80 | 1.85 | 1.68 | 42,210 |   |  			
            | 11/15/2019 | +0.09 / +5.14% | 1.75 | 1.87 | 1.70 | 1.84 | 1.78 | 1.71 | 277,710 |   |  
            | 11/14/2019 | +0.01 / +0.57% | 1.74 | 1.79 | 1.70 | 1.75 | 1.71 | 1.63 | 29,190 |   |  			
            | 11/13/2019 | -0.03 / -1.69% | 1.72 | 1.76 | 1.72 | 1.74 | 1.74 | 1.62 | 44,760 |   |  
            | 11/12/2019 | +0.04 / +2.31% | 1.73 | 1.77 | 1.73 | 1.77 | 1.75 | 1.65 | 14,490 |   |  			
            | 11/11/2019 | +0.03 / +1.76% | 1.70 | 1.75 | 1.69 | 1.73 | 1.69 | 1.61 | 7,680 |   |  
            | 11/8/2019 | -0.01 / -0.58% | 1.72 | 1.75 | 1.70 | 1.70 | 1.73 | 1.58 | 35,290 |   |  |