|
| year | consumption | change |
| 1980 | 55,984.19 | NA |
| 1981 | 50,830.88 | -9.20 % |
| 1982 | 51,088.82 | 0.51 % |
| 1983 | 46,040.24 | -9.88 % |
| 1984 | 44,274.34 | -3.84 % |
| 1985 | 42,486.39 | -4.04 % |
| 1986 | 34,973.09 | -17.68 % |
| 1987 | 30,746.77 | -12.08 % |
| 1988 | 24,124.08 | -21.54 % |
| 1989 | 32,538.03 | 34.88 % |
| 1990 | 33,829.94 | 3.97 % |
| 1991 | 35,682.94 | 5.48 % |
| 1992 | 31,544.84 | -11.60 % |
| 1993 | 25,013.65 | -20.70 % |
| 1994 | 24,566.11 | -1.79 % |
| 1995 | 25,682.75 | 4.55 % |
| 1996 | 27,925.96 | 8.73 % |
| 1997 | 24,091.02 | -13.73 % |
| 1998 | 28,914.73 | 20.02 % |
| 1999 | 25,628.74 | -11.36 % |
| 2000 | 24,695.08 | -3.64 % |
| 2001 | 20,684.87 | -16.24 % |
| 2002 | 22,257.87 | 7.60 % |
| 2003 | 23,708.51 | 6.52 % |
| 2004 | 22,469.52 | -5.23 % |
| 2005 | 23,323.81 | 3.80 % |
| 2006 | 21,562.31 | -7.55 % |
| 2007 | 22,426.53 | 4.01 % |
| 2008 | 21,122.49 | -5.81 % |
| 2009 | 18,855.04 | -10.73 % |
| 2010 | 20,020.18 | 6.18 % |
| 2011 | 17,191.65 | -14.13 % |
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