NOBLESVILLE, Ind. (AP) — Burgeoning demand for senior services like home health aides is being met by a surprising segment of the workforce: Other seniors.

Twenty-nine percent of so-called direct-care workers are projected to be 55 or older by 2018. And in some segments of that population, older workers are the single largest age demographic.

Though the jobs are among the fastest-growing in the U.S., they may seem a curious choice for older workers for their physical demands, low pay and high rates of injury.

But with high rates of turnover, home care agencies have shown a willingness to hire older people new to the field who have found a tough job market as they try to supplement their retirement income.