California Air Resources Board 2004 Almanac (web)								
Chapter 4	San Diego NOx  Emission Trends				Table 4-27			
"NOx Emission Trends (tons/day, annual average)"								
Emission Source	1975	1980	1985	1990	1995	2000	2005	2010
All Sources	282	274	286	319	272	227	188	153
Stationary Sources	48	32	17	19	16	10	10	12
Area-wide Sources	3	3	3	3	3	3	3	3
On-Road Mobile	178	174	195	216	185	149	113	83
   Gasoline Vehicles	168	155	156	157	133	96	62	43
   Diesel Vehicles	10	19	39	59	52	52	51	40
Other Mobile	54	67	71	81	68	66	62	55