Timeline over Settlements By DillonGray Period: Nov 24, 1760 to Nov 24, 1815 Emigration Slowed in the U.S. Nov 24, 1790 2/3 of the United States is of British origin Nov 24, 1790 20% of the United States from Africa Nov 24, 1913 Well over four-fifths of all immigrants were from Europe Nov 24, 1913 Imigration was at its highest Nov 24, 1920 United States Restricts Immigration Period: Nov 24, 1970 to Nov 24, 1989 Statistics suggest a fourth movement period Period: Nov 24, 1980 to Nov 24, 1989 Mexico, The West Indies peak imigration Nov 24, 1990 Population reached 250 million