11.20 The changing age distribution of the United States. The distribution of the ages of a nation's population has a strong influence on economic and social conditions. Table 11.5 shows the age distribution of U.S. residents in 1950 and 2050, in millions of persons. The 1950 data come from that year's census. The 2050 data are projections made by the Census Bureau. a. Because the total population in 2050 is much larger than the 1950 population, comparing percentages in each age group is clearer than comparing counts. Make a table of the percentage of the total population in each age group for both 1950 and 2050. b. Make a histogram of the 1950 age distribution (in percents). Then describe the main features of the distribution. In particular, look at the percentage of children relative to the rest of the population. c. Make a histogram of the projected age distribution for the year 2050. Use the same scales as in (b) for easy comparison. What are the most important changes in the U.S. age distribution projected for the 100-year period between 1950 and 2050? Table 11.5 Age distribution in the United States, 1950 and 2050 (in millions of persons) Age group 1950 2050 Under 10 years 29.3 53.6 10 to 19 years 21.8 53.1 20 to 29 years 24.0 50.4 30 to 39 years 22.8 18 40 to 49 years 19.3 45.1 50 to 59 years 15.5 43.3 60 to 69 years 11.0 39.4 70 to 79 years 5.5 29.8 80 to 89 years 1.6 21.2 90 to 99 years 0.1 8.2 100 years and older 0.8 Total 151.1 310.6 Data from https://www.census,gov/prod/2002pubs/censr-4.pdf and DII -O- PrtSon Home End PgUp F4 F5 F6 F7 F8 F9 F10 F11 % & 5 6 8 O