7-10  Efficiency of Energy Conversion
	(%)
Year	Total Efficiency	Electricity Generation and	Coking	Petroleum Refining
		Heating  by Power Stations
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	66.48	37.34	91.28	90.19
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	70.19	36.63	94.07	97.46
1997	69.76	35.89	94.01	97.37
1998	69.28	37.09	94.97	96.41
1999	69.25	37.04	96.13	97.51
2000	69.04	37.36	96.21	97.32
2001	69.34	37.63	96.48	97.92
2002	69.04	38.73	96.63	96.71
2003	69.40	38.83	96.13	96.80
2004	70.91	39.46	97.55	96.43
2005	71.55	39.87	97.57	96.86
2006	71.24	39.87	97.77	96.86
2007	70.77	40.24	97.56	97.17
2008	71.55	41.04	97.75	97.17
2009	72.01	41.73	97.38	96.63