1.13 Age pyramids as descriptive statistics The figure shown is a graph published by Statistics Sweden. It compares Swedish society in 1750 and in 2010 on the numbers of men and women of various ages, using age pyramids.

Explain how this indicates that

a. In 1750, few Swedish people were old.

b. In 2010, Sweden had many more people than in 1750.

c. In 2010, of those who were very old, more were female than male.

d. In 2010, the largest five-year group included people born during the era of first manned space flight.

Age pyramids, 1750 and 2010 1750 Thousands Sweden: 2010 80+ Men 90 Women 75-79 Men 70-74 80 65-69 6 8 8 8 8 8 70 60 60-64 55-59 50-54 45-49 50 40-44 35-39 40 30-34 30 25-29 20-24 20 15-19 10-14 10 5-9 0 150 100 50 0 Women 0-4 0 50 100 150 350 300 250 200 150 100 50 0 0 50 100 150 200 250 300 350 Population (in thousands)