PHILADELPHIA (CBS/AP) – Most people do not need a government study to tell them they’re not getting enough sleep.

But have you ever wondered where the most sleep-deprived people live?

A new CDC study says people in South Dakota sleep the most, while people in Hawaii sleep the least.

The report also found that while two-thirds of white people nationally got enough sleep, only about half of blacks, Native Hawaiians and Pacific Islanders did.

THE PROBLEM

For adults, the recommended amount of sleep is seven to nine hours each night. Past studies have found that more than one-third of U.S. adults get less. The Centers for Disease Control and Prevention on Thursday released a new round of national survey data that found the same thing.

Some of those people — nearly 10 percent of Americans, by some estimates — suffer chronic insomnia and may seek a physician’s help. Inadequate sleep has been tied to the start and worsening of a range of diseases and conditions, including diabetes, heart disease, obesity and depression.

Experts say for good health, adults need at least seven hours of sleep each night.

Doctors offer tips for good sleeping that include sticking to a regular bedtime schedule, getting exercise each day and avoiding caffeine and nicotine at night.

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