NOₓ Emissions (thousand tons)				NOₓ Rate (lb/mmBtu)
Primary Fuel	2000	2005	2010	2017	2000	2005	2010	2017
Coal	NOₓ Emissions (thousand tons)	4,587	3,356	1,896	918	NOₓ Rate (lb/mmBtu)	0.44	0.32	0.20	0.14
Gas	NOₓ Emissions (thousand tons)	355	167	142	131	NOₓ Rate (lb/mmBtu)	0.18	0.06	0.04	0.03
Oil	NOₓ Emissions (thousand tons)	162	104	20	4	NOₓ Rate (lb/mmBtu)	0.31	0.25	0.13	0.11
Other	NOₓ Emissions (thousand tons)	2	6	5	7	NOₓ Rate (lb/mmBtu)	0.24	0.42	0.13	0.10
Total / Average	NOₓ Emissions (thousand tons)	5,106	3,633	2,063	1,060	NOₓ Rate (lb/mmBtu)	0.40	0.27	0.16	0.09