For 2010, the domestic automakers reported significant profits, indicating the beginning of rebound. Between 2009 and 2010, Detroit ranked seventh in the nation for economic recovery. A study conducted in 2006 by the University of Michigan-Dearborn determined that, in addition to the roughly 18,000 employees at the Detroit Metropolitan Wayne County Airport, activity had generated an additional 14,500 jobs in Wayne County and another 70,000 statewide, primarily through firms such as hotels, restaurants, and rental car agencies. The study made the assumption that passenger traffic through the airport and economic activity in these service industries would increase on a 1:1 ratio.