|
| year | consumption | change |
| 1980 | 1,493.00 | NA |
| 1981 | 1,421.00 | -4.82 % |
| 1982 | 1,511.00 | 6.33 % |
| 1983 | 1,450.88 | -3.98 % |
| 1984 | 1,540.41 | 6.17 % |
| 1985 | 1,624.42 | 5.45 % |
| 1986 | 1,620.00 | -0.27 % |
| 1987 | 1,672.00 | 3.21 % |
| 1988 | 1,513.00 | -9.51 % |
| 1989 | 1,550.00 | 2.45 % |
| 1990 | 1,535.00 | -0.97 % |
| 1991 | 1,715.00 | 11.73 % |
| 1992 | 1,668.92 | -2.69 % |
| 1993 | 1,713.80 | 2.69 % |
| 1994 | 1,654.37 | -3.47 % |
| 1995 | 1,700.95 | 2.82 % |
| 1996 | 1,873.81 | 10.16 % |
| 1997 | 1,762.85 | -5.92 % |
| 1998 | 1,751.87 | -0.62 % |
| 1999 | 1,705.01 | -2.68 % |
| 2000 | 1,725.42 | 1.20 % |
| 2001 | 1,768.75 | 2.51 % |
| 2002 | 1,767.20 | -0.09 % |
| 2003 | 1,774.93 | 0.44 % |
| 2004 | 1,811.20 | 2.04 % |
| 2005 | 1,741.17 | -3.87 % |
| 2006 | 1,690.21 | -2.93 % |
| 2007 | 1,643.45 | -2.77 % |
| 2008 | 1,713.73 | 4.28 % |
| 2009 | 1,729.02 | 0.89 % |
| 2010 | 1,936.99 | 12.03 % |
| 2011 | 1,691.13 | -12.69 % |
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