"NOX Emission Trends (tons/day, annual average)"								
Emission Source	1975	1980	1985	1990	1995	2000	2005	2010
All Sources	274	267	284	320	279	234	186	152
Stationary Sources	46	31	17	21	19	17	18	20
Area-wide Sources	2	2	2	3	3	3	3	4
On-Road Mobile	168	164	191	214	188	146	101	72
   Gasoline Vehicles	158	146	157	161	141	106	68	47
   Diesel Vehicles	10	17	34	53	47	40	33	26
Other Mobile	58	70	74	83	70	68	64	57