Figure 1 Annual Weights for the Aggregation of Transportation,,,,,,,,,,
,Railroad transportation,Transportation by air,Water transportation,Trucking and warehousing,Local and interurban passenger transit,Rail Passenger,Rail Freight,"Pipelines, except natural gas",Air Passenger,Air Freight
1979,0.212,0.182,0.072,0.425,0.052,0.006,0.206,0.056,0.168,0.014
1980,0.215,0.188,0.074,0.415,0.054,0.006,0.209,0.054,0.173,0.015
1981,0.217,0.183,0.077,0.410,0.052,0.006,0.210,0.061,0.169,0.014
1982,0.190,0.191,0.073,0.417,0.056,0.007,0.184,0.072,0.178,0.014
1983,0.184,0.206,0.069,0.416,0.055,0.004,0.180,0.070,0.192,0.015
1984,0.179,0.213,0.065,0.425,0.059,0.003,0.176,0.060,0.197,0.015
1985,0.171,0.210,0.065,0.438,0.060,0.004,0.167,0.057,0.197,0.013
1986,0.170,0.216,0.060,0.447,0.063,0.004,0.166,0.044,0.189,0.027
1987,0.152,0.237,0.058,0.444,0.060,0.004,0.148,0.049,0.208,0.030
1988,0.150,0.278,0.059,0.419,0.058,0.004,0.146,0.037,0.242,0.036
1989,0.128,0.282,0.062,0.433,0.060,0.004,0.124,0.036,0.250,0.032
1990,0.124,0.285,0.063,0.436,0.057,0.004,0.121,0.035,0.260,0.024
1991,0.132,0.282,0.066,0.425,0.061,0.004,0.128,0.033,0.257,0.025
1992,0.124,0.290,0.061,0.430,0.063,0.004,0.121,0.032,0.264,0.026
1993,0.119,0.305,0.058,0.427,0.061,0.003,0.115,0.030,0.276,0.029
1994,0.116,0.311,0.057,0.430,0.058,0.003,0.113,0.027,0.280,0.031
1995,0.112,0.322,0.055,0.424,0.059,0.003,0.110,0.026,0.288,0.035
1996,0.108,0.325,0.056,0.423,0.062,0.003,0.105,0.026,0.288,0.037
1997,0.098,0.335,0.056,0.423,0.064,0.002,0.096,0.025,0.296,0.039
1998,0.093,0.329,0.052,0.438,0.065,0.002,0.091,0.023,0.291,0.038
1999,0.085,0.331,0.050,0.447,0.065,0.003,0.082,0.022,0.291,0.039
2000,0.081,0.330,0.053,0.448,0.067,0.003,0.078,0.022,0.292,0.038
2001,0.079,0.337,0.053,0.442,0.066,0.003,0.076,0.023,0.295,0.042
2002,0.078,0.343,0.054,0.437,0.065,0.004,0.075,0.023,0.300,0.044
"Source: ""Gross Product by Industry"" table, Survey of Current Business, November 2001.",,,,,,,,,,