This data collection contains 12 statistical tables that were published in the HISTORICAL SUPPLEMENT OF THE UNITED NATIONS DEMOGRAPHIC YEARBOOK, issued in 1980 to commemorate the 30th anniversary of the publication of the DEMOGRAPHIC YEARBOOK. It presents time series data on population size, age, sex, urban/rural residence, natality, mortality, and nuptiality as well as selected derived measures concerning these components of population change for countries of the world over a 30-year time period. The unit of analysis is ethnic group within a country, by year. Parts 1 and 2 contain tables (labeled 1-12, in non-chronological order) stratified by ethnicity, urbanicity, and/or sex. Part 1 contains six tables: (1) estimates of mid-year population and vital statistics summary, 1948-1978, (2) population by sex, urbanicity, and intercensal rates of increase for total population, each census, 1948-1978, (4) selected derived measures of natality, 1948-1977, (7) female population by age, total number of children born alive, and total number of children living, each census, 1948-1978, (8) life expectancy by sex and age, 1948-1977, and (11) selected derived measures of marriage and divorce. The six tables in Part 2 are: (3) population by age, sex, and urban/rural residence, each census, 1948-1977, (5) live births by age of mother and sex of infant, 1948-1977, (6) live-birth rates specific for age of mother, 1948-1977, (9) deaths by age and sex, 1948-1977, (10) death rates specific for age and sex, 1948-1977, and (12) population by marital status, age, and sex, each census, 1948-1977. The records in Part 3 are text and correspond to the footnotes for the tables in the other two files.