  -    
        
           
         
          
          
     2018     
    2018         
         
         
         
         
         
        
          
       
        
         
         
           
         
         
         
         
          
        
         
    3.8     
         
   2018      
  2018         
2017            
       
       
           
            
            
        
          
        
       
          