"FIGURE 1-2. Passenger Travel Activity, Energy Consumption, and Energy Efficiency Indexes, 1990=1",,,,,,,,,,,
Passenger,1990,1991,1992,1993,1994,1995,1996,1997,1998,1999,2000
Activity,1.00,1.03,1.06,1.08,1.11,1.09,1.13,1.17,1.20,1.22,1.23
Energy,1.00,0.97,1.01,1.04,1.06,1.07,1.10,1.13,1.16,1.19,1.18
Efficiency,1.00,1.05,1.05,1.04,1.05,1.02,1.03,1.04,1.04,1.02,1.04
"Source: Department of Transportation, Bureau of Transportation Statistics, National Transportation Statistics 2002, tables 1-34, 4-6.",,,,,,,,,,,