"TABLE 2-3a  Change in Passenger-Miles of Travel, U.S. Population, and Gross Domestic Product (GDP): 1991–2001",,,,,,,,,,,
"Index: 1991 = 1.00
",,,,,,,,,,,
,1991,1992,1993,1994,1995,1996,1997,1998,1999,2000,2001
GDP,1.00,1.03,1.06,1.10,1.13,1.17,1.23,1.28,1.33,1.38,1.39
U.S. resident population,1.00,1.01,1.03,1.04,1.05,1.06,1.08,1.09,1.10,1.12,1.13
GDP per capita,1.00,1.02,1.03,1.06,1.07,1.10,1.14,1.17,1.21,1.24,1.23
Total pmt,1.00,1.03,1.05,1.07,1.08,1.11,1.15,1.18,1.21,1.24,1.24
NOTES: Total passenger-miles of travel (pmt) excludes motorcycle pmt and results in some double counting of bus pmt. ,,,,,,,,,,,
"
SOURCES: GDP—Based on chained 2000 dollar data from U.S. Department of Commerce (USDOC), Bureau of Economic Analysis, National Income and Product Accounts, summary GDP table, available at http://www.bea.doc.gov/bea/dn1.htm, as of January 2004.   Population—USDOC, U.S. Census Bureau, National Intercensal Estimates 1990-2000 and National Population Estimates, available at http://eire.census.gov/popest/estimates.php, as of October 2003. Pmt—U.S. Department of Transportation, Bureau of Transportation Statistics, National Transportation Statistics 2002, table 1-34 revised, available at http://www.bts.gov/, as of October 2003.",,,,,,,,,,,