5. Approximately how many more 10-year-old childrenwere there in 1980 than in 1986?
A. 100，000 B.200，000 C.300，000 D. 400，000 E.1，000，000
6. The population of females was greater in 1980 than in 1986 forapproximately what percent of the ages from 0 to 100 years?
A. 15% B.25% C.55% D.75% E.85%
7. In 1980 the ratio of the number of males to the number of femaleswas greatest for which of the following ages?
A. 10 B. 30 C.50 D.70 E.90
