UnitedHealthcare has been polling centenarians annually for the past nine years, and the studies document that the 100+ age group is overall happy, well adjusted and not burdened with regrets.

This year’s study, summarized in USA Today, finds that centenarians on average feel about 83. (Baby boomers also were surveyed this year, and on average a 65-year-old feels 55.)

Most centenarians did not expect to live to 100, and most baby boomers do not expect to reach that age. Both say that attitude and physical health are equally important to reaching 100.

Full study results are available here.