Compared to those living near or below the poverty level, the rich sleep more, according to a study by the US Centers for Disease Control and Prevention.

The agency surveyed nearly 140,000 adults in the United States between 2011 and 2014 and found that the more money someone made, the more likely they were to get a full night’s rest.

Of the adults surveyed, only 55% of people living below the poverty threshold received seven to eight hours of sleep per night. For adults making 400% above the poverty threshold, that number rose to 66.6%. In 2014, the poverty threshold was $11,670 for a single-person household and $23,850 for a four-person household.

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