Year Number Percent

2001 5,618,000 2.7%

2002 5,856,000 2.8

2003 6,095,000 2.8

2004 6,332,000 2.9

2005 6,568,000 3.0

2006 6,804,000 3.1

2007 7,040,000 3.1

2008 7,275,000 3.2

2009 7,511,000 3.3

2010 7,745,000 3.4

*Based on prevalence estimates for exact ages through 2001 and

projections for exact ages from 2002 through 2010. See

_Methodology_ for estimation procedures.

Projected adult

Year resident population

2001 210,207,901

2002 212,427,944

2003 214,688,268

2004 216,918,713

2005 219,144,044

2006 221,409,946

2007 223,754,193

2008 226,155,771

2009 228,520,785

2010 230,792,746

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+Lifetime likelihood estimates of going to prison differ from current

prevalence estimates+

The lifetime likelihood of going to prison is an estimate of the

percentage of all persons in a birth cohort expected to go to prison

over the course of a lifetime. In contrast, the prevalence of ever

having gone to prison is an estimate of the percentage who have ever

gone to prison among just the surviving members of all birth cohorts

over a specific period.

Estimates of the lifetime likelihood of going to prison project the

percentage of persons at birth expected to go to prison, if the entire

cohort were subject to a fixed set of rates of first admission to

prison and mortality over an entire lifetime. In calculating these

estimates, incarceration and mortality rates are fixed at the time of

"birth" of the cohort.

Standard life table techniques were used to prepare estimates of the

lifetime likelihood of going to prison based on rates of first

incarceration during a 12-month period derived from inmate surveys

conducted in 1974, 1979, 1986, 1991, and 1997. (See Lifetime Likelihood

of Going to State or Federal Prison, NCJ 160092, March 1997, for a

description of previous estimates.)

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+6.6% of persons born in 2001 will go to prison, if current rates of

first incarceration remain unchanged+

If rates of first incarceration and mortality in 2001 remain unchanged,

nearly 1 in 15 persons born in 2001 (6.6%) will go to State or Federal

prison during their lifetime (figure 3).

[Illustration: Figure 3: Lifetime chances of going to prison]

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Prevalence of Imprisonment in the U.S. Population, 1974-2001 · 第 33 / 43 题