What is the sequence of immigration of the various ethnic groups into the United States?

20,000 B.C. ------------------Native Americans

16^th century ------------------Spanish Colonization --- (Florida, California, Southwest)

16^th-18^th century--------------French fur traders and colonization (New Orleans, Louisiana Territory)

17^th –18^th century-------------English colonization—English, Scotts, Welsh, Scotts-Irish, Africans

19^th century--------------------Dutch, Irish, Germans, Scandinavians (northwestern Europe), Chinese,

Mexican Annexation

20^th century--------------------Italians, Czechs, Polish, Russians, Greeks (Eastern and Southern Europeans)

Japanese and Filipinos

Iowa’s Recent Immigrants and Refugees

1970’s to present-------------Vietnamese, Laotians, Cambodians, Hmong, Ethnic Chinese, Russians, Nigerians, Bosnians, Sudanese, Mexicans