California Air Resources Board 2006 Almanac (web) Chapter 4 San Diego Air Basin  Table 4-43 "ROG Emission Trends (tons/day, annual average)" Emission Source 1975 1980 1985 1990 1995 2000 2005 2010 2015 2020 All Sources 439 437 413 343 267 226 186 173 168 170 Stationary Sources 40 57 54 52 45 50 55 63 70 76 Area-wide Sources 34 40 44 47 41 41 38 40 42 44 On-Road Mobile 334 303 272 194 132 89 60 43 32 25 Gasoline Vehicles 334 302 269 191 129 86 58 41 30 24 Diesel Vehicles 1 1 3 3 3 2 2 2 2 1 Other Mobile 31 37 44 50 49 46 33 27 25 24 Gasoline Fuel 23 28 35 40 40 38 24 19 17 16 Diesel Fuel 4 5 6 7 6 5 5 4 3 2 Other Fuel 3 3 3 3 3 4 4 4 5 6