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At 3, most children are still napping, while at 5, most are not. Naps gradually become shorter as well. New sleep problems do not usually develop after 3 years of age. 7-12 Years Old: 10 - 11 hours per day.At these ages, with social, school, and family activities, bedtimes gradually become later and later, with most 12-years-olds going to bed at about 9 p.m.There is still a wide range of bedtimes, from 7:30 to 10 p.m., as well as total sleep times, from 9 to 12 hours, although the average is only about 9 hours.12-18 Years Old: 8 - 9 hours per day.t 3, most children are still napping, while at 5, most are not. Naps gradually become shorter as well. New sleep problems do not usually develop after 3 years of age. 7-12 Years Old: 10 - 11 hours per day.
PRINCETON, NJ -- Fifty-nine percent of Americans get seven or more hours of sleep at night, while 40% get less than seven hours. Those figures are largely unchanged from Gallup polls in the 1990s and 2000s, but Americans, on average, slept much more in the 1940s.Americans currently average 6.8 hours of sleep at night, down more than an hour from 1942.mericans aged 65 and older report getting the most sleep, with 67% getting seven or more hours per night. Each younger age group gets less sleep, down to 54% of 18- to 29-year-olds who report getting seven or more hours. Nearly half of 18- to 29-year-olds get less than the recommended amount of sleep.