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Chapter 3 Population Geography - W.H. Freeman

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92 <strong>Chapter</strong> 3 <strong>Population</strong> <strong>Geography</strong><br />

Age in years<br />

80<br />

75<br />

70<br />

65<br />

60<br />

55<br />

50<br />

45<br />

40<br />

35<br />

30<br />

25<br />

20<br />

15<br />

10<br />

5<br />

Males<br />

Females<br />

Projected population<br />

structure in 2020<br />

Deficits due to AIDS<br />

0<br />

140 120 100 80 60 40 20 0 20 40 60 80 100 120 140<br />

<strong>Population</strong> (thousands)<br />

Figure 3.13 Projected population structure<br />

with and without the AIDS epidemic in<br />

Botswana in 2020. (Sources: U.S. Bureau of Census;<br />

Food and Agriculture Organization of the United Nations.)<br />

Gender Ratio<br />

80<br />

180 140 100 60 20<br />

80<br />

60<br />

Sex Ratio<br />

(Males/Females)<br />

40<br />

0.84–0.89<br />

0.90–0.97<br />

20<br />

0.98–0.99<br />

1<br />

1.01–1.02<br />

0<br />

140 120<br />

20<br />

1.03–1.09<br />

1.10–2.20<br />

0 1000 2000 mi.<br />

0 1000 2000 3000 km<br />

Scale at latitude 35°<br />

Flat Polar Quartic<br />

equal area projection<br />

40<br />

Figure 3.14 Females as a percentage of<br />

total population. What explanations can you<br />

come up with for the gender imbalances<br />

shown on this map? (Source: <strong>Population</strong><br />

Reference Bureau.)<br />

100 80 60 40 20

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