A new report from the Census Bureau shows more Americans are walking or bicycling to work.

The report compared how people commuted to work. Between three and four percent of Iowa workers walk to work according to the U.S. Census Bureau, while about half a percent of all workers in Iowa use a bike to get to and from work. The Census Bureau listed work commute data for a few cities in neighboring states and found that in Omaha, Nebraska, fewer than two-and-a-half percent of workers in that city walk to work and just a fraction bike to work.

Biking and walking commutes are more common in college towns, according to the Census Bureau, and the agency also analyzed the salaries of those who rode a bike or walked to work. It found the highest percentage of non-motorized commutes among the highest paid and highly-educated workers.