At each year of age, the estimated number of living persons ever incarcerated is equal to the number of persons identified as a prisoner for the first time that year plus the number of surviving members of the birth cohort who were prisoners in prior years. The age-specific prevalence rate for members of the birth cohort is obtained by dividing the surviving number of persons ever incarcerated by the number of members of the 100,000 birth cohort who have survived to the current age (including both those never incarcerated and those ever incarcerated). ---------------------------------------------------------------------- +Appendix table 1. Calculating the number of persons ever incarcerated in State or Federal prison, 2001+ Prevalence of ever going to prison, 2001 U.S. resident population, Year of Age in 2000[a] Percent[b] Number[c] birth 2001 (1) (2) (3) 1983-1901 18 or older 210,207,901 2.673 5618000 2001-1988 0-13 56,557,383 0.000 0 1987 14 4,063,179 0.000 0 1986 15 4,071,585 0.000 0 1985 16 4,083,677 0.036 1,000 1984 17 4,117,221 0.174 7,000 1983 18 4,022,021 0.453 18,000 1982 19 4,327,407 0.794 34,000 1981 20 4,264,552 1.146 49,000 1980 21 4,140,721 1.510 63,000 1979 22 3,935,452 1.845 73,000 1978 23 3,756,052 2.155 81,000 1977 24 3,766,377 2.428 91,000 1976 25 3,643,765 2.676 97,000 1975 26 3,572,926 2.911 104,000 1974 27 3,579,019 3.082 110,000 1973 28 3,386,129 3.252 110,000 1972 29 3,876,011 3.360 130,000 1971 30 3,989,205 3.506 140,000 1970 31 4,032,301 3.584 145,000 1969 32 3,993,019 3.689 147,000 1968 33 3,899,282 3.764 147,000 1967 34 4,057,246 3.824 155,000 1966 35 4,110,892 3.857 159,000 1965 36 4,182,093 3.895 163,000 1964 37 4,416,302 3.887 172,000 1963 38 4,265,440 3.840 164,000 1962 39 4,826,377 3.778 182,000 1961 40 4,725,422 3.692 174,000 1960 41 4,634,371 3.641 169,000