^a Includes all consumer and government purchases of goods (e.g., vehicles and fuel) and services (e.g., auto insurance) and exports related to transportation.

^b Includes all other categories, such as entertainment, personal care products and services, and payments to pension plans.

Source: U.S. Department of Transportation, Bureau of Transportation Statistics, calculated from data in U.S. Department of Commerce, Bureau of Economic Analysis, Survey of Current Business, October 2001.