. "3 The Face of the U.S. Population in 2050." The New Americans: Economic, Demographic, and Fiscal Effects of Immigration. Washington, DC: The National Academies Press, 1997.
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TABLE 3.5 Age-Sex Structure of the U.S. Population in 1995 in the Absence of Migration Since 1950
Hypothetical Population Under Assumption of No Migration
Number (thousands)
Percentage of Total
Observed Population Number (thousands)
Percentage of Total
Ratio of Observed to Hypothetical Population
Age Group
Males
Females
Males
Females
Males
Females
Males
Females
Males
Females
0-9
17,065
16,583
7.6
7.4
19,862
18,941
7.6
7.2
99.6
97.7
10-19
15,436
15,092
6.9
6.7
18,952
18,038
7.2
6.9
104.9
102.4
20-29
15,506
15,276
6.9
6.8
18,593
18,263
7.1
6.9
102.5
102.2
30-39
18,487
18,442
8.2
8.2
21,995
22,166
8.4
8.4
101.8
102.8
40-49
16,010
16,423
7.1
7.3
18,560
19,129
7.1
7.3
99.2
99.6
50-59
10,482
11,147
4.7
5.0
11,994
12,782
4.5
4.9
97.4
98.0
60-69
8,532
10,146
3.8
4.5
9,227
10,745
3.5
4.1
92.4
91.5
70-79
5,860
8,015
2.6
3.6
6,555
8,965
2.5
3.4
95.4
95.2
80+
2,061
4,306
.9
1.9
2,622
5,478
1.0
2.1
109.7
108.3
Total
109,439
115,330
48.7
51.3
128,311
134,509
48.8
51.2
100.3
99.7
Both Sexes
224,769
100.0
262,820
100.0
100.0
Sources: The hypothetical 1995 population, under the assumption of no migration since 1950. is derived by surviving the 1950 population, by age and sex, using period life tables and adding annual births using period fertility rates, and surviving births, by age and sex until 1995. The observed 1995 population is taken from estimates of the U.S. Bureau of the Census (1996a:Table 2).
