Section: Human Geography

19) The percentage of people who are too young or too old to work in a society is the: 

1. dependency rate
2. life expectancy
3. population pyramid
4. sex ratio

Age dependency ratio is the ratio of dependents--people younger than 15 or older than 64--to the working-age population--those ages 15-64. Data are shown as the proportion of dependents per 100 working-age population.