"State spending for corrections increased from $65 per resident in 1986 to $134 in 2001 (table 1). Per capita expenditures for State prison operations alone rose from $49 in 1986 to $104 in 2001.
"At an average annual increase of 6.2% for total State correctional spending and 6.4% specifically for prisons, increases in the cost of adult incarceration outpaced those of health care (5.8%), education (4.2%), and natural resources (3.3%).
"Although correctional spending grew at a faster rate than many other State boards and programs (including court payments between 1986 and 2001, it remained one of the smaller cost items. For example, the outlay for education, at $374.5 billion, was nearly 10 times larger, and that for welfare, at $260.3 billion, was nearly 7 times larger."
Stephan, James J., "State Prison Expenditures, 2001," Bureau of Justice Statistics (Washington, DC: US Department of Justice, June, 2004), NCJ202949.