Since 1790, the population count has been used to determine the number of congressional representatives for each state. This apportionment has taken place after every census, except for 1920.

Since 1790, the population count has been used to determine the number of congressional representatives for each state. This apportionment has taken place after every census, except for 1920. Learn more at https://t.co/bZfDrklt6o #ArtifactFriday #CensusHistory pic.twitter.com/dUPy1dylc5

— U.S. Census Bureau (@uscensusbureau) October 25, 2019