       1.75  

    5  13   

           

         CNNIC

13    2019      

          

   2019       

  1.75       

           

93.9%  90.3%    2018  5.4    

 3.6      

       

          

     93.9%  56.7%  

45.0%   31.5%   28.9%  

           

 74 %       63.6%   