SO₂ Emissions (thousand tons)				SO₂ Rate (lb/mmBtu)
Primary Fuel	2000	2005	2010	2017	2000	2005	2010	2017
Coal	SO₂ Emissions (thousand tons)	10,708	9,835	5,051	1,316	SO₂ Rate (lb/mmBtu)	1.04	0.95	0.53	0.14
Gas	SO₂ Emissions (thousand tons)	108	91	19	8	SO₂ Rate (lb/mmBtu)	0.06	0.03	0.01	0.03
Oil	SO₂ Emissions (thousand tons)	384	292	28	2	SO₂ Rate (lb/mmBtu)	0.73	0.70	0.19	0.11
Other	SO₂ Emissions (thousand tons)	1	4	22	12	SO₂ Rate (lb/mmBtu)	0.20	0.27	0.57	0.10
Total / Average	SO₂ Emissions (thousand tons)	11,201	10,222	5,120	1,338	SO₂ Rate (lb/mmBtu)	0.88	0.75	0.39	0.09