California Air Resources Board 2006 Almanac (web)										
Chapter 4	San Diego Air Basin 						Table 4-49			
"CO Emission Trends (tons/day, annual average)"										
Emission Source	1975	1980	1985	1990	1995	2000	2005	2010	2015	2020
All Sources	3299	3030	2924	2458	1719	1279	938	742	610	539
Stationary Sources	30	29	28	28	26	40	25	31	31	33
Area-wide Sources	23	25	27	29	27	28	28	28	29	30
On-Road Mobile	3059	2740	2586	2067	1360	930	626	438	306	225
   Gasoline Vehicles	3056	2735	2575	2052	1347	918	616	429	298	217
   Diesel Vehicles	3	6	11	15	13	11	11	9	8	8
Other Mobile	187	236	282	334	306	282	258	244	244	252
   Gasoline Fuel	147	188	234	279	258	237	214	200	199	205
   Diesel Fuel	17	22	25	29	23	20	17	16	15	15
   Other Fuel	23	25	23	26	25	25	26	28	29	32