What percentage of the population is of the Viet or Kinh ethnic group ?
The largest ethnic groups are : Kinh ( Viet ) 86.2 % , Tay 1.9 % , Tai Ethnic 1.7 % , Mường 1.5 % , Khmer Krom ( Khơ Me Crộm ) 1.4 % , Hoa 1.1 % , Nùng 1.1 % , Hmong 1 % , others 4.1 % ( 1999 census ) .