|
| year | consumption | change |
| 1980 | 41,321.24 | NA |
| 1981 | 42,807.16 | 3.60 % |
| 1982 | 46,094.25 | 7.68 % |
| 1983 | 49,178.52 | 6.69 % |
| 1984 | 54,498.27 | 10.82 % |
| 1985 | 53,685.87 | -1.49 % |
| 1986 | 49,777.07 | -7.28 % |
| 1987 | 55,780.26 | 12.06 % |
| 1988 | 60,763.81 | 8.93 % |
| 1989 | 60,336.11 | -0.70 % |
| 1990 | 53,849.01 | -10.75 % |
| 1991 | 55,937.33 | 3.88 % |
| 1992 | 58,421.40 | 4.44 % |
| 1993 | 55,048.33 | -5.77 % |
| 1994 | 57,251.85 | 4.00 % |
| 1995 | 58,457.78 | 2.11 % |
| 1996 | 59,333.01 | 1.50 % |
| 1997 | 62,955.82 | 6.11 % |
| 1998 | 65,680.12 | 4.33 % |
| 1999 | 65,292.49 | -0.59 % |
| 2000 | 69,616.48 | 6.62 % |
| 2001 | 68,336.69 | -1.84 % |
| 2002 | 68,618.88 | 0.41 % |
| 2003 | 68,554.95 | -0.09 % |
| 2004 | 66,222.46 | -3.40 % |
| 2005 | 66,434.10 | 0.32 % |
| 2006 | 64,905.20 | -2.30 % |
| 2007 | 63,615.49 | -1.99 % |
| 2008 | 62,484.52 | -1.78 % |
| 2009 | 54,423.32 | -12.90 % |
| 2010 | 53,841.30 | -1.07 % |
| 2011 | 47,122.71 | -12.48 % |
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