Data from the Census Bureau shows considerable decreases in the proportion of workers who walk to work, from a high of 5.6% in 1980 to a low of 2.5% in 2005. After a slight increase in 2006, the proportion has remained near 3%, with slight declines in recent years. Since 2005, the American Community Survey (ACS) has provided yearly estimates of the rate of walking to work, which is shown here.