|
| year | consumption | change |
| 1980 | | NA |
| 1981 | | NA |
| 1982 | | NA |
| 1983 | | NA |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | | NA |
| 1987 | | NA |
| 1988 | | NA |
| 1989 | | NA |
| 1990 | | NA |
| 1991 | | NA |
| 1992 | 7,503.43 | NA |
| 1993 | 7,618.07 | 1.53 % |
| 1994 | 7,975.22 | 4.69 % |
| 1995 | 8,195.69 | 2.76 % |
| 1996 | 8,082.15 | -1.39 % |
| 1997 | 8,314.73 | 2.88 % |
| 1998 | 9,370.75 | 12.70 % |
| 1999 | 8,498.82 | -9.30 % |
| 2000 | 8,660.86 | 1.91 % |
| 2001 | 9,353.11 | 7.99 % |
| 2002 | 8,092.07 | -13.48 % |
| 2003 | 8,305.92 | 2.64 % |
| 2004 | 8,291.59 | -0.17 % |
| 2005 | 8,151.59 | -1.69 % |
| 2006 | 7,464.85 | -8.42 % |
| 2007 | 7,561.86 | 1.30 % |
| 2008 | 8,368.75 | 10.67 % |
| 2009 | 8,159.31 | -2.50 % |
| 2010 | 7,557.45 | -7.38 % |
| 2011 | 6,599.54 | -12.68 % |
|
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