Inmates held in custody in state or federal prisons or in local jails:
According to the Bureau of Justice Statistics, Inmates held in custody in state or federal prisons or in local jails rose from 1,937,482 in 2000 to 2,292,133 in 2009.
Bureau of Justice Statistics Special Report, Survey of Youth in Custody
Women in Prison:
The female prison population in the USA is exploding, largely because of drugs. It is estimated that more than 85% of those female inmates are mothers; many penal institutions have set up nurseries to care for their children. The US Bureau of Criminal Justice reported in 1981 that the number of female prisoners was 13,420 while the Bureau of Justice Statistics reported in 2010 that the number of adult women under correctional supervision increased from 78,500 in 1990 to 198,600 in 2009.