According to the U.S. Census, older populations will exceed children in most world regions by 2050. By midcentury, most world regions will resemble Europe, which in 2005 became the first major world region where the population 65 and older outnumbered those younger than 15. More information about international populations is available at the U.S. Census International database, http://www.census.gov/population/international/data/idb/informationGateway.php