1980 1,842,100
1981 2,008,300
1982 2,194,400
1983 2,476,800
1984 2,690,700
1985 3,013,100
1986 3,241,100
1987 3,461,400
1988 3,715,800
1989 4,057,800
1990 4,350,300
1991 4,537,900
1992 4,765,400
1993 4,948,300
1994 5,148,000
1995 5,342,900
1996 5,490,700
1997 5,734,900
1998 6,134,200
1999 6,340,800
2000 6,445,100
2001 6,581,700
2002 6,758,800
2003 6,924,500
2004 6,995,200
2005 7,056,000
“Seems to be a growing, lucrative business (383% growth rate). These are total numbers of people under correctional supervision.”
Interesting. However, while it does account for the decline in crime, it doesn’t support your point.