 Those of African descent increased slightly from 30.8% to 32.3% during the first period (1980 and 1991) before falling to 30.2% in the 2002 census.With small growth in the overall population, the decline in the shares of the two larger groups has resulted in the relative increase of shares of the multiracial and Amerindian groups.The Amerindian population rose by 22,097 people between 1991 and 2002.