Domestically, Harley-Davidson competes most heavily in the touring and custom segments of the heavyweight motorcycle market, which together accounted for 80%, 79%, and 80% of total heavyweight retail unit sales in the United States during 2007, 2006, and 2005, respectively. The custom and touring motorcycles are generally the most expensive vehicles in the market and the most profitable. During 2007, the heavyweight segment including standard, performance, touring, and custom motorcycles, represented approximately 54% of the total U.S. motorcycle market in terms of new units registered.