The importance of a full night’s sleep is difficult to overstate. Those who do not get enough sleep put not only their own health at risk, but also potentially jeopardize the safety of those they interact with on a daily basis — from the street to the workplace. Still, more than a third of American adults get dangerously little sleep.

According to the Centers for Disease Control and Prevention, American adults should get a minimum of seven hours of sleep per night. Failure to do so is linked to a number of chronic conditions including heart disease, obesity, and depression — and studies have shown that sleep-deprived drivers can be just as dangerous as drunk drivers.

Sleepiness is also a problem in the workplace, and implications range in severity from lost productivity to accidents that affect thousands. Sleep deprivation costs the U.S. economy an estimated $411 billion a year and has been cited as a factor in some of the world’s most devastating workplace accidents, including the Exxon Valdez oil tanker spill, the space shuttle Challenger explosion, and the near meltdown at the Three Mile Island nuclear plant.

While any number of reasons can account for insufficient sleep, many of those who do not sleep enough are under frequent stress. In some states, adults are far more likely to get enough sleep than in others.

24/7 Wall St. reviewed CDC data on the share of adults who sleep less than seven hours per night to identify the states getting the most and least sleep.

Click here to see the states getting the most and least sleep.
Click here to see our detailed findings and methodology.