| 
    
        
            | 
                    Closing price on 5/22/2020
                 |  |  
    
        |           
                
                    | Open | 1.47 |  
                    | High | 1.47 |  
                    | Low | 1.42 |  
                    | Volume | 155,930 |  
                    | Split-adjusted Price | 1.34 |  
                
             | 
 |  VOS Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 5/22/2020 | -0.03 / -2.04% | 1.47 | 1.47 | 1.42 | 1.44 | 1.45 | 1.34 | 155,930 |   |  
            | 5/21/2020 | +0.09 / +6.52% | 1.39 | 1.47 | 1.37 | 1.47 | 1.44 | 1.37 | 1,011,330 |   |  			
            | 5/20/2020 | +0.01 / +0.73% | 1.37 | 1.41 | 1.36 | 1.38 | 1.36 | 1.28 | 179,660 |   |  
            | 5/19/2020 | -0.02 / -1.44% | 1.39 | 1.39 | 1.37 | 1.37 | 1.39 | 1.28 | 69,900 |   |  			
            | 5/18/2020 | -0.01 / -0.71% | 1.39 | 1.40 | 1.38 | 1.39 | 1.39 | 1.29 | 77,100 |   |  
            | 5/15/2020 | -0.02 / -1.41% | 1.42 | 1.42 | 1.37 | 1.40 | 1.38 | 1.30 | 99,080 |   |  			
            | 5/14/2020 | -0.01 / -0.70% | 1.43 | 1.43 | 1.40 | 1.42 | 1.41 | 1.32 | 123,930 |   |  
            | 5/13/2020 | +0.07 / +5.15% | 1.36 | 1.45 | 1.36 | 1.43 | 1.42 | 1.33 | 328,210 |   |  			
            | 5/12/2020 | 0.00 / 0.00% | 1.36 | 1.38 | 1.35 | 1.36 | 1.35 | 1.27 | 51,040 |   |  
            | 5/11/2020 | 0.00 / 0.00% | 1.36 | 1.36 | 1.33 | 1.36 | 1.34 | 1.27 | 153,700 |   |  			
            | 5/8/2020 | 0.00 / 0.00% | 1.37 | 1.38 | 1.34 | 1.36 | 1.35 | 1.27 | 76,770 |   |  
            | 5/7/2020 | 0.00 / 0.00% | 1.36 | 1.36 | 1.34 | 1.36 | 1.35 | 1.27 | 99,920 |   |  			
            | 5/6/2020 | -0.01 / -0.73% | 1.37 | 1.37 | 1.35 | 1.36 | 1.36 | 1.27 | 73,380 |   |  
            | 5/5/2020 | +0.02 / +1.48% | 1.35 | 1.37 | 1.35 | 1.37 | 1.36 | 1.28 | 33,570 |   |  			
            | 5/4/2020 | -0.05 / -3.57% | 1.40 | 1.40 | 1.35 | 1.35 | 1.35 | 1.26 | 80,580 |   |  
            | 4/29/2020 | 0.00 / 0.00% | 1.40 | 1.41 | 1.38 | 1.40 | 1.39 | 1.30 | 43,830 |   |  			
            | 4/28/2020 | +0.04 / +2.94% | 1.35 | 1.40 | 1.33 | 1.40 | 1.37 | 1.30 | 19,720 |   |  
            | 4/27/2020 | -0.04 / -2.86% | 1.41 | 1.43 | 1.34 | 1.36 | 1.37 | 1.27 | 80,280 |   |  			
            | 4/24/2020 | -0.06 / -4.11% | 1.45 | 1.45 | 1.36 | 1.40 | 1.38 | 1.30 | 239,300 |   |  
            | 4/23/2020 | +0.03 / +2.10% | 1.43 | 1.46 | 1.40 | 1.46 | 1.42 | 1.36 | 52,210 |   |  			
            | 4/22/2020 | +0.03 / +2.14% | 1.39 | 1.43 | 1.35 | 1.43 | 1.37 | 1.33 | 109,070 |   |  
            | 4/21/2020 | -0.09 / -6.04% | 1.40 | 1.45 | 1.39 | 1.40 | 1.40 | 1.30 | 224,070 |   |  			
            | 4/20/2020 | +0.07 / +4.93% | 1.40 | 1.49 | 1.40 | 1.49 | 1.44 | 1.39 | 287,840 |   |  
            | 4/17/2020 | +0.06 / +4.41% | 1.36 | 1.43 | 1.35 | 1.42 | 1.39 | 1.32 | 119,350 |   |  			
            | 4/16/2020 | 0.00 / 0.00% | 1.35 | 1.36 | 1.32 | 1.36 | 1.33 | 1.27 | 299,000 |   |  
            | 4/15/2020 | +0.02 / +1.49% | 1.32 | 1.36 | 1.32 | 1.36 | 1.33 | 1.27 | 78,680 |   |  			
            | 4/14/2020 | 0.00 / 0.00% | 1.33 | 1.36 | 1.31 | 1.34 | 1.32 | 1.25 | 56,760 |   |  
            | 4/13/2020 | -0.03 / -2.19% | 1.37 | 1.37 | 1.34 | 1.34 | 1.36 | 1.25 | 185,070 |   |  			
            | 4/10/2020 | 0.00 / 0.00% | 1.35 | 1.39 | 1.35 | 1.37 | 1.37 | 1.28 | 67,750 |   |  
            | 4/9/2020 | +0.03 / +2.24% | 1.32 | 1.38 | 1.32 | 1.37 | 1.35 | 1.28 | 214,650 |   |  |