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