Which transportation mode increased the most between 2000 and 2012?

The US Census Bureau's report detailing this info for 2000 through 2012 was released earlier this month. "Nationwide, the number of people who traveled to work by bike increased roughly 60 percent over the last decade, from about 488,000 in 2000 to about 786,000 during the 2008-2012 period. This is the largest percentage increase of all commuting modes tracked by the 2000 Census and the 2008-2012 American Community Survey," according to the United States Census Bureau. Read more.