California Air Resources Board 2006 Almanac (web) Chapter 4 San Francisco Bay Area Air Basin  Table 4-19 "Directly Emitted PM10 Emission Trends (tons/day, annual average)" Emission Source 1975 1980 1985 1990 1995 2000 2005 2010 2015 2020 All Sources 178 179 193 192 189 219 213 226 238 251 Stationary Sources 39 28 24 21 23 21 17 18 18 19 Area-wide Sources 118 129 144 143 144 177 175 187 199 210 On-Road Mobile 7 9 12 12 9 9 10 10 10 11 Gasoline Vehicles 5 4 4 5 5 6 7 8 9 9 Diesel Vehicles 2 5 7 7 4 3 3 2 2 1 Other Mobile 14 14 14 16 13 12 12 11 11 11 Gasoline Fuel 1 1 1 1 2 2 2 2 3 3 Diesel Fuel 10 9 10 11 9 9 8 7 6 5 Other Fuel 3 3 3 4 3 2 2 2 2 3