| 
                 
                    Closing price on 4/6/2018
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    7.60 | 
                 
                
                    | High | 
                    8.00 | 
                 
                
                    | Low | 
                    6.80 | 
                     
                
                    | Volume | 
                    6,900 | 
                                 
                
                    | Split-adjusted Price | 
                    6.35 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
AMS Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                4/6/2018
             | 
            
                +0.30 / +3.90%
             |             
            
                7.60
             |           
            
                8.00
             |               
            
                6.80
             |                           
            
                8.00
             | 
            
                7.86
             |                     
            
                6.35
             |                                 
            
                6,900
             |            
            
                 
             |                                       
         
    
        
            | 
                4/5/2018
             | 
            
                +0.70 / +10.00%
             |             
            
                7.70
             |           
            
                7.70
             |               
            
                7.70
             |                           
            
                7.70
             | 
            
                7.70
             |                     
            
                6.11
             |                                 
            
                200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/4/2018
             | 
            
                -1.00 / -12.50%
             |             
            
                7.90
             |           
            
                8.00
             |               
            
                7.00
             |                           
            
                7.00
             | 
            
                7.63
             |                     
            
                5.56
             |                                 
            
                300
             |            
            
                 
             |                                       
         
    
        
            | 
                4/3/2018
             | 
            
                0.00 / 0.00%
             |             
            
                7.50
             |           
            
                8.00
             |               
            
                7.20
             |                           
            
                8.00
             | 
            
                7.89
             |                     
            
                6.35
             |                                 
            
                8,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/2/2018
             | 
            
                +0.10 / +1.27%
             |             
            
                7.80
             |           
            
                8.00
             |               
            
                6.90
             |                           
            
                8.00
             | 
            
                7.87
             |                     
            
                6.35
             |                                 
            
                5,900
             |            
            
                 
             |                                       
         
    
        
            | 
                3/30/2018
             | 
            
                0.00 / 0.00%
             |             
            
                7.90
             |           
            
                8.00
             |               
            
                6.90
             |                           
            
                8.00
             | 
            
                7.92
             |                     
            
                6.35
             |                                 
            
                7,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/29/2018
             | 
            
                +1.10 / +15.94%
             |             
            
                7.90
             |           
            
                8.00
             |               
            
                6.70
             |                           
            
                8.00
             | 
            
                7.87
             |                     
            
                6.35
             |                                 
            
                6,100
             |            
            
                 
             |                                       
         
    
        
            | 
                3/28/2018
             | 
            
                -1.10 / -13.75%
             |             
            
                7.90
             |           
            
                7.90
             |               
            
                6.90
             |                           
            
                6.90
             | 
            
                7.76
             |                     
            
                5.48
             |                                 
            
                700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/27/2018
             | 
            
                0.00 / 0.00%
             |             
            
                8.00
             |           
            
                8.00
             |               
            
                8.00
             |                           
            
                8.00
             | 
            
                8.00
             |                     
            
                6.35
             |                                 
            
                0
             |            
            
                 
             |                                       
         
    
        
            | 
                3/26/2018
             | 
            
                0.00 / 0.00%
             |             
            
                8.00
             |           
            
                8.00
             |               
            
                8.00
             |                           
            
                8.00
             | 
            
                8.00
             |                     
            
                6.35
             |                                 
            
                0
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/23/2018
             | 
            
                +0.10 / +1.25%
             |             
            
                6.60
             |           
            
                8.10
             |               
            
                6.60
             |                           
            
                8.10
             | 
            
                7.97
             |                     
            
                6.43
             |                                 
            
                5,600
             |            
            
                 
             |                                       
         
    
        
            | 
                3/22/2018
             | 
            
                0.00 / 0.00%
             |             
            
                7.60
             |           
            
                8.00
             |               
            
                7.60
             |                           
            
                8.00
             | 
            
                7.65
             |                     
            
                6.35
             |                                 
            
                1,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/21/2018
             | 
            
                0.00 / 0.00%
             |             
            
                8.00
             |           
            
                8.00
             |               
            
                8.00
             |                           
            
                8.00
             | 
            
                8.00
             |                     
            
                6.35
             |                                 
            
                0
             |            
            
                 
             |                                       
         
    
        
            | 
                3/20/2018
             | 
            
                +0.10 / +1.27%
             |             
            
                8.00
             |           
            
                8.00
             |               
            
                8.00
             |                           
            
                8.00
             | 
            
                8.00
             |                     
            
                6.35
             |                                 
            
                300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/19/2018
             | 
            
                0.00 / 0.00%
             |             
            
                7.90
             |           
            
                7.90
             |               
            
                7.90
             |                           
            
                7.90
             | 
            
                7.90
             |                     
            
                6.27
             |                                 
            
                0
             |            
            
                 
             |                                       
         
    
        
            | 
                3/16/2018
             | 
            
                0.00 / 0.00%
             |             
            
                7.90
             |           
            
                7.90
             |               
            
                7.90
             |                           
            
                7.90
             | 
            
                7.90
             |                     
            
                6.27
             |                                 
            
                0
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/15/2018
             | 
            
                0.00 / 0.00%
             |             
            
                7.90
             |           
            
                7.90
             |               
            
                7.90
             |                           
            
                7.90
             | 
            
                7.90
             |                     
            
                6.27
             |                                 
            
                200
             |            
            
                 
             |                                       
         
    
        
            | 
                3/14/2018
             | 
            
                0.00 / 0.00%
             |             
            
                7.90
             |           
            
                7.90
             |               
            
                7.90
             |                           
            
                7.90
             | 
            
                7.90
             |                     
            
                6.27
             |                                 
            
                100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/13/2018
             | 
            
                0.00 / 0.00%
             |             
            
                7.90
             |           
            
                7.90
             |               
            
                7.90
             |                           
            
                7.90
             | 
            
                7.90
             |                     
            
                6.27
             |                                 
            
                100
             |            
            
                 
             |                                       
         
    
        
            | 
                3/12/2018
             | 
            
                0.00 / 0.00%
             |             
            
                7.90
             |           
            
                7.90
             |               
            
                7.90
             |                           
            
                7.90
             | 
            
                7.90
             |                     
            
                6.27
             |                                 
            
                50,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/9/2018
             | 
            
                -0.10 / -1.25%
             |             
            
                8.00
             |           
            
                8.00
             |               
            
                7.80
             |                           
            
                7.90
             | 
            
                7.86
             |                     
            
                6.27
             |                                 
            
                4,600
             |            
            
                 
             |                                       
         
    
        
            | 
                3/8/2018
             | 
            
                +0.20 / +2.56%
             |             
            
                7.80
             |           
            
                8.00
             |               
            
                7.80
             |                           
            
                8.00
             | 
            
                7.90
             |                     
            
                6.35
             |                                 
            
                2,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/7/2018
             | 
            
                -0.20 / -2.50%
             |             
            
                7.80
             |           
            
                7.80
             |               
            
                7.80
             |                           
            
                7.80
             | 
            
                7.80
             |                     
            
                6.19
             |                                 
            
                0
             |            
            
                 
             |                                       
         
    
        
            | 
                3/6/2018
             | 
            
                0.00 / 0.00%
             |             
            
                8.00
             |           
            
                8.00
             |               
            
                7.50
             |                           
            
                8.00
             | 
            
                7.80
             |                     
            
                6.35
             |                                 
            
                5,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/5/2018
             | 
            
                +0.50 / +6.67%
             |             
            
                8.00
             |           
            
                8.00
             |               
            
                8.00
             |                           
            
                8.00
             | 
            
                8.00
             |                     
            
                6.35
             |                                 
            
                500
             |            
            
                 
             |                                       
         
    
        
            | 
                3/2/2018
             | 
            
                0.00 / 0.00%
             |             
            
                7.50
             |           
            
                8.60
             |               
            
                7.50
             |                           
            
                8.60
             | 
            
                7.52
             |                     
            
                6.83
             |                                 
            
                5,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/1/2018
             | 
            
                0.00 / 0.00%
             |             
            
                8.60
             |           
            
                8.60
             |               
            
                8.60
             |                           
            
                8.60
             | 
            
                8.60
             |                     
            
                6.83
             |                                 
            
                0
             |            
            
                 
             |                                       
         
    
        
            | 
                2/28/2018
             | 
            
                0.00 / 0.00%
             |             
            
                8.60
             |           
            
                8.60
             |               
            
                8.60
             |                           
            
                8.60
             | 
            
                8.60
             |                     
            
                6.83
             |                                 
            
                0
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/27/2018
             | 
            
                0.00 / 0.00%
             |             
            
                8.60
             |           
            
                8.60
             |               
            
                8.60
             |                           
            
                8.60
             | 
            
                8.60
             |                     
            
                6.83
             |                                 
            
                0
             |            
            
                 
             |                                       
         
    
        
            | 
                2/26/2018
             | 
            
                0.00 / 0.00%
             |             
            
                8.60
             |           
            
                8.60
             |               
            
                8.60
             |                           
            
                8.60
             | 
            
                8.60
             |                     
            
                6.83
             |                                 
            
                0
             |  
            
                 
             |                                                              
             
    
         
    
    
 |