NOₓ Emissions (thousand tons)				NOₓ Rate (lb/mmBtu)				Heat Input (billion mmBtu)
Primary Fuel	2000	2005	2010	2016	2000	2005	2010	2016	2000	2005	2010	2016
Coal	NOₓ Emissions (thousand tons)	4,587	3,356	1,896	1,029	NOₓ Rate (lb/mmBtu)	0.44	0.32	0.20	0.16	Heat Input (billion mmBtu)	20.67	20.77	19.04	13.30
Gas	NOₓ Emissions (thousand tons)	355	167	143	155	NOₓ Rate (lb/mmBtu)	0.18	0.06	0.04	0.03	Heat Input (billion mmBtu)	3.88	5.50	7.06	10.08
Oil	NOₓ Emissions (thousand tons)	162	104	19	9	NOₓ Rate (lb/mmBtu)	0.31	0.25	0.13	0.10	Heat Input (billion mmBtu)	1.05	0.84	0.30	0.16
Other	NOₓ Emissions (thousand tons)	2	6	5	7	NOₓ Rate (lb/mmBtu)	0.24	0.42	0.13	0.10	Heat Input (billion mmBtu)	0.01	0.03	0.08	0.14
Total	NOₓ Emissions (thousand tons)	5,104	3,633	2,063	1,373	NOₓ Rate (lb/mmBtu)	0.40	0.27	0.16	0.10	Heat Input (billion mmBtu)	25.61	27.14	26.48	23.68