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US Census Bureau. (September 15, 2020). Distribution of resident population of the District of Columbia in 2019, by age group [Graph]. In Statista. Retrieved April 23, 2021, from https://www.statista.com/statistics/1021895/district-of-columbia-population-share-age-group/
US Census Bureau. "Distribution of resident population of the District of Columbia in 2019, by age group." Chart. September 15, 2020. Statista. Accessed April 23, 2021. https://www.statista.com/statistics/1021895/district-of-columbia-population-share-age-group/
US Census Bureau. (2020). Distribution of resident population of the District of Columbia in 2019, by age group. Statista. Statista Inc.. Accessed: April 23, 2021. https://www.statista.com/statistics/1021895/district-of-columbia-population-share-age-group/
US Census Bureau. "Distribution of Resident Population of The District of Columbia in 2019, by Age Group." Statista, Statista Inc., 15 Sep 2020, https://www.statista.com/statistics/1021895/district-of-columbia-population-share-age-group/
US Census Bureau, Distribution of resident population of the District of Columbia in 2019, by age group Statista, https://www.statista.com/statistics/1021895/district-of-columbia-population-share-age-group/ (last visited April 23, 2021)
