We’ve all heard of — and most of us have experienced — jet lag.

But which destinations are always the most fatigued? Researchers looked at working hours per year to how many hours people were on their computers each day and the average sleep time.

The most sleep deprived country in the world might surprise you. It’s Singapore followed by Mexico and Brazil.

Which other countries were in the top ten? The United States is number four followed by Japan, the United Kingdom and New Zealand.

Scoring low on the fatigue scale is Germany, France, and The Netherlands.