The present report presents world population estimates from 1950 to the present for 237 countries or areas, underpinned by analyses of historical demographic trends. The 2022 revision also presents population projections to the year 2100 that reflect a range of plausible outcomes at the global, regional and national levels. For the first time, the estimates and projections are presented in one-year intervals of age and time instead of the five-year intervals used previously.