356 343 1474 1.510

Note: Calculations for ages 0 to 13 were based on data for each
single year of age and then grouped for presentation.

... Not shown, because calculations were based on rates for single
years of age.

[a] To estimate the number expected to die at each year of age,
age-specific mortality rates(column 2) were multiplied by the number
of persons alive and not previously incarcerated (column 1).

[b] To estimate the number expected to go to prison at each year of
age, age-specific first admission rates (column 4) were multiplied
by the number of persons surviving (column 1 minus column 3).

[c] To estimate the surviving number of first admissions, the number
of first admissions from the x-th year of age (column 5) were added
to the number of surviving first admissions from the x-1 year of age.
Mortality rates for ex-prisoners by age were based on mortality rates
in the general population and adjusted to reflect higher ex-prisoner
mortality.

[d]To estimate the prevalence percent, this procedure was followed.

The surviving number of persons ever incarcerated (column 6) was
divided by the total number of surviving persons never incarcerated
(column 1 minus both columns 3 and 5) and persons ever incarcerated
(column 6), times 100%.

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<B>Appendix table 3. Estimating the prevalence of imprisonment in the
U.S. population for persons born in 1970</B>

Population of 100,000 births, 1970, reduced by mortality and
incarceration in each successive year of age

Number alive Rate of first
and not admission Surviving
incarcerated to State Expected cumulative
at beginning Number Expected or Federal number of number of
of age dying per number of prison per first first Prevalence
Age at first interval 100,000 deaths[a] 100,000 admissions[b] admissions[c] perc