Courtesy US PIRG.

A new report confirms what you probably already know: People in D.C., and across America, are driving fewer and fewer miles a year.

The U.S. Public Interest Research Group says residents of D.C. drove an average of 5,774 miles in 2011, a decrease of 14.4 percent from 2005. The peak year for D.C.’s driving was 2003, with annual miles per person dropping a whopping 21.7 percent since then.

“After a sixty-year ‘Driving Boom’ of traveling more behind the wheel almost every year, Americans have reduced their average driving miles each of the last eight years,” the report states. “This is a huge break from past trends that policy makers and researchers are still grappling to understand.”

PIRG says that economic trouble doesn’t appear to be a factor in the decline, and “the jury is still out on whether telecommuting overall reduces how much people drive.”

“Programs like Capital Bikeshare and car2go, when added to an already expansive transportation network, have encouraged many to leave their cars at home or even get rid of their cars all together,” Katie Sihler, program director of DDOT’s goDCgo, said in the release. “We believe that having an array of options makes it easy and convenient to choose a more sustainable transportation mode.”