|
| year | consumption | change |
| 1984 | 3,188.22 | NA |
| 1985 | 3,281.79 | 2.94 % |
| 1986 | 4,180.69 | 27.39 % |
| 1987 | 4,472.34 | 6.98 % |
| 1988 | 4,583.99 | 2.50 % |
| 1989 | 5,205.29 | 13.55 % |
| 1990 | 5,392.30 | 3.59 % |
| 1991 | 5,822.69 | 7.98 % |
| 1992 | 5,673.72 | -2.56 % |
| 1993 | 5,708.22 | 0.61 % |
| 1994 | 5,949.02 | 4.22 % |
| 1995 | 6,160.77 | 3.56 % |
| 1996 | 6,474.95 | 5.10 % |
| 1997 | 6,638.82 | 2.53 % |
| 1998 | 6,475.39 | -2.46 % |
| 1999 | 6,748.55 | 4.22 % |
| 2000 | 7,240.86 | 7.30 % |
| 2001 | 7,242.90 | 0.03 % |
| 2002 | 7,567.81 | 4.49 % |
| 2003 | 7,607.96 | 0.53 % |
| 2004 | 7,876.32 | 3.53 % |
| 2005 | 7,717.52 | -2.02 % |
| 2006 | 7,796.90 | 1.03 % |
| 2007 | 8,499.85 | 9.02 % |
| 2008 | 8,332.65 | -1.97 % |
| 2009 | 8,238.24 | -1.13 % |
| 2010 | 8,961.40 | 8.78 % |
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