California Air Resources Board 2006 Almanac (web)										
Chapter 4	San Diego Air Basin 						Table 4-51			
"NOx Emission Trends (tons/day, annual average)"										
Emission Source	1975	1980	1985	1990	1995	2000	2005	2010	2015	2020
All Sources	280	273	287	319	270	231	189	157	131	125
Stationary Sources	48	32	17	19	16	14	9	11	11	12
Area-wide Sources	2	3	3	3	3	3	3	3	3	3
On-Road Mobile	178	174	195	216	185	149	113	83	57	41
   Gasoline Vehicles	168	155	156	157	133	96	62	43	30	22
   Diesel Vehicles	10	19	39	59	52	52	51	40	27	20
Other Mobile	52	65	72	81	66	66	65	61	60	69
   Gasoline Fuel	3	3	4	5	5	6	6	6	6	5
   Diesel Fuel	44	56	62	68	53	50	46	38	31	27
   Other Fuel	5	6	6	7	8	11	13	17	23	36