persons age 31 in
2001 who had ever gone to prison, the calculations were applied to the
1970 birth cohort. However, the rates of first incarceration (column
4) and mortality (column 2) used in the calculations were unique to the
birth cohort. (Note the differences between Appendix tables 2 and 3.)

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<B>Appendix table 2. Estimating the prevalence of imprisonment in the
U.S. population for persons born in 1980</B>

Population of 100,000 births, 1980, reduced by mortality and
incarceration in each successive year of age

Number alive
and not Rate of first Surviving
incarcerated admission to Expected cumulative
at beginning Number Expected State or number of number of
Age at of age dying per number of Federal prison first first Prevalence
first interval 100,000 deaths[a] per 100,000 admissions[b] admissions[c] percent[d]
admission Year (1) (2) (3) (4) (5) (6) (7)

0-13 1980-93 100,000 ... 1,732 0 0 0 0.000%
14 1994 98,268 44 43 1 1 1 0.001
15 1995 98,224 57 56 5 5 6 0.006
16 1996 98,163 73 72 39 38 44 0.045
17 1997 98,053 84 83 135 132 176 0.180
18 1998 97,838 93 91 283 277 453 0.462
19 1999 97,470 93 91 346 337 789 0.806
20 2000 97,043 94 91 355 344 1132 1.158
21 2001 96,607 96 92