The graph shows monthly travel in 2007, the previous year, ten years prior, and twenty years prior. In the May 2008 report, 2007 monthly data was revised with the final estimates of travel. Using the table beneath the graph, total travel in 2007 decreased less than one percent from 2006. A decrease from a prior year has not occurred since the early 1980s. Total travel in 2007 increased 14.4 percent from ten years prior (1997) and increased 46.7 percent from twenty years prior (1987). Travel increased 28.3 percent from 1987 to 1997.

Note: An archive is available.