Animated mapsPopulationVideoVivid maps U.S. population under 18 (1970 – 2010) November 19, 2015 Alex This post may contain affiliate links. As an Amazon Associate, we earn from qualifying purchases. Related Posts:U.S. Population under 5 years of age percent change…Neighborhood Racial and Ethnic Change Trajectories…Largest denominations families in the United States…Population density of religious adherents (1890 - 2010)Animated Map: Faithland, 1890 - 2010Largest participating religious group (1906 - 2010)FaithlandSecond largest participating religious group (1906 - 2010)