Oklahoma is the only state with a nonprofit organization which honors its centenarians – Centenarians of Oklahoma, a volunteer-run and donation-driven group that has recognized more than 2,370 centenarians since its inception in 1991. Here are some interesting statistics compiled by the group:

•The state’s oldest man is John Haws Jr. of Tulsa, born in September, 1914.

•The 2010 census report showed about 450 centenarians in the state at that time.

•About 316,000 people worldwide are currently 100 or older.

•The highest percentage of centenarians – more than 70,000 – live in Japan. That includes Kane Tanaka, believed to be the world’s oldest woman at 116.

•North Dakota boasts the highest number of centenarians in the U.S. – approximately three for every 10,000 people.

•More than 80% of centenarians are women, 38% live alone or with family and fewer than 20 percent are veterans.

•Quinton, Okla., is named for Elizabeth Jacobs Quinton, a member of the Choctaw Tribe who died in 1941 at the age of 116.