Statistics Population 84 Emigration and immigration 51 Periodicals 41 Census, 20th, 1980 25 History 25 Ethnic groups 22 more ... Minorities 21 African Americans 15 Economic conditions 13 Jews 13 Social conditions 13 Education 11 Hispanic Americans 11 Housing 11 Immigrants 11 Census, 1980 10 Climate 9 Bibliography 8 Employment 7 Canadians 6 Ethnology 6 Weather 6 Census, 16th, 1940 5 Census, 21st, 1990 5 Cities and towns 5 Commerce 5 Labor supply 5 Almanacs, American 4 Asian Americans 4 Census 4 Census districts 4 Census, 11th, 1890 4 Coal mines and mining 4 Economic aspects 4 Microform catalogs 4 Microforms 4 Poor 4 Agriculture 3 Census, 13th, 1910 3 less ...