6-10 エネルギー加工変換効率

単位：％

年	総効率	発電及び 発電所の熱供給	コークス製造	石油精製
1983	69.93	36.94	91.18	99.16
1984	69.16	36.95	90.08	99.17
1985	68.29	36.85	90.79	99.10
1986	68.32	36.69	90.63	99.04
1987	67.48	36.75	90.46	98.81
1988	66.54	36.34	90.77	98.76
1989	66.51	36.74	90.30	98.57
1990	67.20	37.34	91.28	97.90
1991	65.90	37.60	89.90	98.10
1992	66.00	37.80	92.70	96.80
1993	67.32	39.90	98.05	98.49
1994	65.20	39.35	89.62	97.48
1995	71.05	37.31	91.99	97.67
1996	71.50	38.30	94.07	97.46
1997	69.23	35.89	92.08	97.37
1998	69.44	37.06	94.97	97.42
1999	69.19	37.04	96.21	97.51
2000	69.04	37.36	96.21	97.32
2001	69.03	37.63	96.50	97.92
2002	69.04	38.73	96.63	96.71
2003	69.40	38.83	96.13	96.80
2004	70.71	39.46	97.61	96.43
2005	71.16	39.87	97.61	96.86
2006	71.24	39.87	97.77	96.86
2007	71.25	40.24	97.78	97.17