For the first time in history, more than one in every 100 American adults is in jail or prison - the current population is 2,319,258.

New York ? For the first time in U.S. history, more than one of every 100 adults is in jail or prison, according to a new report documenting America’s rank as the world’s No. 1 incarcerator. It urges states to curtail corrections spending by placing fewer low-risk offenders behind bars.

Using state-by-state data, the report says 2,319,258 Americans were in jail or prison at the start of 2008 – one out of every 99.1 adults. It’s more than any other nation.

The report, released Thursday by the Pew Center on the States, said the 50 states spent more than $49 billion on corrections last year, up from less than $11 billion 20 years earlier. The rate of increase for prison costs was six times greater than for higher education spending, the report said.

The steadily growing inmate population “is saddling cash-strapped states with soaring costs they can ill afford and failing to have a clear impact either on recidivism or overall crime,” the report said.

The report cited Kansas and Texas as states that have acted decisively to slow the growth of their inmate population. They are making greater use of community supervision for low-risk offenders and employing sanctions other than reimprisonment for offenders who commit technical violations of parole and probation rules.

According to the report, the average annual cost per prisoner was $23,876.