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Americans aren't getting enough sleep

March 3, 2011 12:00:00 AM PST
In a new government report, Americans say they're sleeping less and feel drowsy when they're driving.

In the preceding month, 35 percent of participants reported less than seven hours of sleep during a typical 24-hour period.

Nearly 40 percent reported unintentionally falling asleep during the day and one in 20 reported nodding off while driving.

Critics say people often report they sleep less than they actually do.

Another government survey found Americans get just as much sleep as they did 40 years ago.