|
| year | consumption | change |
| 1980 | 25,628.74 | NA |
| 1981 | 30,168.06 | 17.71 % |
| 1982 | 30,599.06 | 1.43 % |
| 1983 | 36,044.48 | 17.80 % |
| 1984 | 36,249.51 | 0.57 % |
| 1985 | 41,908.78 | 15.61 % |
| 1986 | 43,946.95 | 4.86 % |
| 1987 | 49,019.79 | 11.54 % |
| 1988 | 56,218.98 | 14.69 % |
| 1989 | 58,635.25 | 4.30 % |
| 1990 | 58,946.10 | 0.53 % |
| 1991 | 58,544.86 | -0.68 % |
| 1992 | 62,202.33 | 6.25 % |
| 1993 | 62,447.04 | 0.39 % |
| 1994 | 65,507.06 | 4.90 % |
| 1995 | 64,434.51 | -1.64 % |
| 1996 | 65,721.34 | 2.00 % |
| 1997 | 66,147.50 | 0.65 % |
| 1998 | 68,238.59 | 3.16 % |
| 1999 | 68,321.26 | 0.12 % |
| 2000 | 72,406.42 | 5.98 % |
| 2001 | 75,494.00 | 4.26 % |
| 2002 | 76,814.57 | 1.75 % |
| 2003 | 78,160.49 | 1.75 % |
| 2004 | 78,964.08 | 1.03 % |
| 2005 | 77,892.63 | -1.36 % |
| 2006 | 71,720.79 | -7.92 % |
| 2007 | 73,948.55 | 3.11 % |
| 2008 | 71,822.20 | -2.88 % |
| 2009 | 72,257.61 | 0.61 % |
| 2010 | 64,285.70 | -11.03 % |
| 2011 | 66,193.80 | 2.97 % |
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