age_pyramid()
Plot a population pyramid (age-sex) from a dataframe.
us_2018 us_2008 us_ins_2018 us_ins_2008 us_gen_2018 us_gen_2008
us_2018
us_2008
us_ins_2018
us_ins_2008
us_gen_2018
us_gen_2008
US Census data for population, age, and gender