Americans are hard workers, putting in an average of 1,799 hours per year, according to the World Economic Forum. That’s 456 hours per year more than Germans work, but 408 fewer than Mexicans do, for example.

Even when given the chance to not work as hard, many Americans won’t, as only 48% of workers use all of their vacation days. It is possible to work hard without overdoing it, though. Hard work is key to success, and the residents of some states understand that better than others.

To determine where Americans work the hardest, WalletHub compared the 50 states across 10 key indicators. They range from average workweek hours to the share of workers with multiple jobs to the average leisure time spent per day.

Montana was ranked 25th.

North Dakota is the hardest-working state, in part because it has the highest employment rate in the country, at over 98%. Plus, workers ages 16 to 64 work an average of 39.7 hours per week – the third-most in the country.

People in the Roughrider State don’t take a lot of time for themselves outside of work, either, as they have the second-lowest amount of leisure time per day. In addition, 33.5% of workers leave some vacation time unused, the second-highest percentage.

To top things off, both adults and young people stay busy in North Dakota. The state has the fifth-lowest share of households where no adults work, and the lowest share of people ages 18 to 24 with no degree beyond a high school diploma who are not in school and not working.

Alaska has the second-hardest-working residents in the country. The average Alaskan worker between the ages of 16 and 64 works 41.6 hours per week, the highest number of hours in the country. This is significant because Alaska is the only state where the average exceeds 40 hours per week. For comparison, people in the District of Columbia work an average of 40.4 hours per week, but Alaska exceeds that by 1.2 hours.

In addition, Alaska has the 12th-highest share of workers who leave some vacation time unused, at 27.5%. It also has the ninth-highest share of workers who have more than one job and the 10th-lowest share of households where no adults work.

Nebraska was 3rd, Wyoming was ranked 4th and South Dakota, 5th.