Inadequate sleep could cost countries billions. Some 35 percent of U.S. adults are not getting the recommended 7 hours of sleep each night. About 30 percent of Canadians don't feel they're getting enough sleep.

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Inadequate sleep could cost countries billions. Some 35 percent of U.S. adults are not getting the recommended 7 hours of sleep each night. About 30 percent of Canadians don't feel they're getting enough sleep.