One out of every 99 American adults lives in a prison cell, according to a new Pew study.

Using updated state-by-state data, the report said 2,319,258 adults were held in U.S. prisons or jails at the start of 2008 — one out of every 99.1 adults, and more than any other country in the world . . . .

The report said the United States is the world’s incarceration leader, far ahead of more populous China with 1.5 million people behind bars. It said the U.S. also is the leader in inmates per capita (750 per 100,000 people), ahead of Russia (628 per 100,000) and other former Soviet bloc nations which make up the rest of the Top 10.