The Business Insider shares the various facts and figures about sleep gleaned from fitness and sleep trackers.

Sleep. We can’t live without it, and we can’t function without enough of it.

But for most of us, getting enough sleep is a problem.

Forty million Americans suffer from chronic sleep disorders each year, and another 20 million experience occasional sleeping problems, according to National Institute of Neurological Disorders and Stroke.

But thanks to fitness trackers like Jawbone UP, and sleeping-aid apps like Sleepio, we have all sorts of data on how we sleep and how to improve our rest.

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