TABLE K-5 Transportation Air Pollutant Emissions: 1992–2002,,,,,,,,,,,
Millions of short tons,,,,,,,,,,,
,Carbon Monoxide,,,Nitrogen Oxides,,,,,,,
,All Sources,"Transportation, total",Transportation (percent),All Sources,"Transportation, total",Transportation (percent),,,,,
1992,140.90,103.89,74,25.26,11.45,45,,,,,
1993,135.90,98.67,73,25.36,11.33,45,,,,,
1994,133.56,93.44,70,25.35,11.22,44,,,,,
1995,126.78,88.22,70,24.96,11.10,44,,,,,
1996,128.86,82.99,64,24.79,10.99,44,,,,,
1997,117.91,80.22,68,24.71,11.02,45,,,,,
1998,115.38,77.64,67,24.35,10.82,44,,,,,
1999,114.54,73.64,64,22.85,10.36,45,,,,,
2000,114.47,72.49,63,22.60,10.57,47,,,,,
2001,106.30,67.99,64,21.55,9.95,46,,,,,
2002,112.05,64.66,58,21.10,9.44,45,,,,,
,,,,,,,,,,,

,Volatile Organic Compounds,,,Sulfur Dioxide,,
,All Sources,"Transportation, total",Transportation (% of total),All Sources,"Transportation, total",Transportation (% of total)
1992,23.07,9.55,41,22.08,0.67,3
1993,22.73,9.05,40,21.77,0.63,3
1994,22.57,8.55,38,21.35,0.60,3
1995,22.04,8.05,37,18.62,0.56,3
1996,20.87,7.56,36,18.39,0.53,3
1997,19.53,7.33,38,18.84,0.54,3
1998,18.78,7.21,38,18.94,0.53,3
1999,18.78,7.10,38,17.55,0.54,3
2000,17.51,6.68,38,16.35,0.49,3
2001,17.12,6.31,37,15.93,0.47,3
2002,16.54,5.93,36,15.35,0.49,3
"
SOURCE:  U.S. Environmental Protection Agency, Clearinghouse for Inventories and Emissions Factors (CHIEF), Current Emission Trends Summaries, Internet website http://www.epa.gov/ttn/chief/trends/ as of Dec. 21, 2004.",,,,,,