Population 412 Census 361 History 209 Demographic surveys 147 Census undercounts 142 Agriculture 139 Methodology 120 Statistics 118 Law and legislation 113 Housing 110 Social conditions 94 Budget 71 Economic conditions 69 Officials and employees 69 SOCIAL SCIENCE 69 General 68 HISTORY 67 Prevention 53 Indians of North America 50 Politics and government 48 Government policy 47 Government publications 47 Management 47 States 47 Apportionment (Election law) 43 Immigrants 43 U.S. states 42 Manufactures 40 African Americans 39 Government questionnaires 38