"NOX Emission Trends (tons/day, annual average)"								
Emission Source	1975	1980	1985	1990	1995	2000	2005	2010
All Sources	322	360	347	374	331	282	232	191
Stationary Sources	26	25	18	29	33	27	28	30
Area-wide Sources	3	4	4	5	6	6	7	8
On-Road Mobile	172	187	211	228	198	158	118	87
   Gasoline Vehicles	146	148	155	151	136	104	72	51
   Diesel Vehicles	27	38	56	76	63	54	45	36
Other Mobile	120	145	114	112	94	90	79	65