SO₂ Emissions (thousand tons)					SO₂ Rate (lb/mmBtu)
Primary Fuel	2000	2005	2010	2020	2021	2000	2005	2010	2020	2021
Coal	SO₂ Emissions (thousand tons)	10,708	9,835	5,052	788	927	SO₂ Rate (lb/mmBtu)	1.04	0.95	0.53	0.18	0.19
Gas	SO₂ Emissions (thousand tons)	108	91	19	5	8	SO₂ Rate (lb/mmBtu)	0.06	0.03	0.01	0.00	0.00
Oil	SO₂ Emissions (thousand tons)	384	292	28	1	1	SO₂ Rate (lb/mmBtu)	0.73	0.70	0.19	0.04	0.06
Other	SO₂ Emissions (thousand tons)	1	4	22	11	7	SO₂ Rate (lb/mmBtu)	0.23	0.27	0.57	0.17	0.10
Total / Average	SO₂ Emissions (thousand tons)	11,201	10,222	5,120	788	942	SO₂ Rate (lb/mmBtu)	0.88	0.75	0.39	0.08	0.09