2003 Almanac (page 115)  Table 3-7  Emission Trends and Forecasts - Oxides of Nitrogen								

"NOx Emission Trends (tons/day, annual average)"								
Emission Source	1975	1980	1985	1990	1995	2000	2005	2010
All Sources	4957	5130	5010	4971	4163	3595	3000	2496
Stationary Sources	1261	1282	1024	938	759	650	575	594
Area-wide Sources	85	90	93	90	89	92	94	90
On-Road Mobile	2435	2459	2721	2748	2311	1888	1470	1088
   Gasoline Vehicles	2149	1975	1936	1797	1538	1108	753	533
   Diesel Vehicles	286	484	784	951	774	780	717	555
Other Mobile	1177	1299	1173	1196	1004	966	860	724