Table V.A2--Social Security Area Population as of July 1 and Dependency Ratios
Calendar Years 1950-2004
Historical Period

Population (in thousands)
Dependency ratio
Calendar
year		 Under 20 20-64 65 and
over		 Total
Aged 1 Total 2
1950 54,466 92,841 12,811 160,118
0.138 0.725
1951 56,419 94,102 13,287 163,808
.141 .741
1952 57,923 94,727 13,719 166,368
.145 .756
1953 59,600 95,209 14,168 168,978
.149 .775
1954 61,398 95,656 14,632 171,687
.153 .795
1955 63,261 96,176 15,073 174,510
.157 .814
1956 65,313 97,075 15,490 177,878
.160 .832
1957 67,401 97,992 15,931 181,324
.163 .850
1958 69,374 98,538 16,393 184,305
.166 .870
1959 71,256 99,129 16,851 187,236
.170 .889
1960 73,076 99,818 17,278 190,172
.173 .905
1961 74,858 100,614 17,679 193,151
.176 .920
1962 76,444 101,576 18,062 196,082
.178 .930
1963 77,766 102,703 18,407 198,876
.179 .936
1964 78,997 103,796 18,746 201,540
.181 .942
1965 80,132 104,795 19,091 204,018
.182 .947
1966 80,743 106,116 19,422 206,281
.183 .944
1967 80,724 107,932 19,766 208,421
.183 .931
1968 80,616 109,755 20,123 210,494
.183 .918
1969 80,571 111,477 20,499 212,547
.184 .907
1970 80,684 113,158 20,923 214,765
.185 .898
1971 80,755 114,913 21,371 217,039
.186 .889
1972 80,502 116,784 21,819 219,105
.187 .876
1973 79,961 118,718 22,276 220,955
.188 .861
1974 79,247 120,742 22,767 222,755
.189 .845
1975 78,437 122,857 23,305 224,599
.190 .828
1976 77,576 125,054 23,871 226,501
.191 .811
1977 76,700 127,366 24,457 228,524
.192 .794
1978 75,884 129,750 25,053 230,687
.193 .778
1979 75,161 132,117 25,653 232,932
.194 .763
1980 74,568 134,428 26,237 235,233
.195 .750
1981 74,126 136,693 26,808 237,627
.196 .738
1982 73,788 138,891 27,425 240,104
.197 .729
1983 73,493 141,028 28,020 242,541
.199 .720
1984 73,249 143,096 28,578 244,922
.200 .712
1985 73,211 144,957 29,167 247,335
.201 .706
1986 73,393 146,603 29,805 249,800
.203 .704
1987 73,703 148,197 30,413 252,313
.205 .703
1988 74,099 149,840 30,954 254,892
.207 .701
1989 74,545 151,581 31,483 257,608
.208 .699
1990 75,060 153,368 32,029 260,458
.209 .698
1991 75,749 155,036 32,587 263,372
.210 .699
1992 76,690 156,522 33,130 266,342
.212 .702
1993 77,751 157,931 33,591 269,273
.213 .705
1994 78,740 159,370 33,971 272,081
.213 .707
1995 79,621 160,844 34,322 274,786
.213 .708
1996 80,433 162,457 34,620 277,511
.213 .708
1997 81,123 164,267 34,858 280,248
.212 .706
1998 81,710 166,161 35,027 282,898
.211 .703
1999 82,192 168,149 35,176 285,517
.209 .698
2000 82,557 170,274 35,423 288,255
.208 .693
2001 82,856 172,607 35,731 291,193
.207 .687
2002 83,138 175,009 36,017 294,164
.206 .681
2003 83,388 177,162 36,250 296,800
.205 .675
2004 83,623 179,092 36,493 299,207
.204 .671
1 Population aged 65 and over, divided by population aged 20-64.
2 Sum of population aged 65 and over, and population under age 20, divided by population aged 20-64.

Notes:
1. Historical data are subject to revision.
2. Totals do not necessarily equal the sums of rounded components.

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