|
| year | consumption | change |
| 1980 | 5,021.03 | NA |
| 1981 | 5,060.71 | 0.79 % |
| 1982 | 5,841.15 | 15.42 % |
| 1983 | 6,517.97 | 11.59 % |
| 1984 | 6,633.71 | 1.78 % |
| 1985 | 7,265.33 | 9.52 % |
| 1986 | 7,922.31 | 9.04 % |
| 1987 | 8,675.19 | 9.50 % |
| 1988 | 8,118.52 | -6.42 % |
| 1989 | 8,881.32 | 9.40 % |
| 1990 | 8,645.43 | -2.66 % |
| 1991 | 8,207.81 | -5.06 % |
| 1992 | 8,291.59 | 1.02 % |
| 1993 | 9,738.84 | 17.45 % |
| 1994 | 11,187.56 | 14.88 % |
| 1995 | 12,161.14 | 8.70 % |
| 1996 | 14,039.04 | 15.44 % |
| 1997 | 14,125.02 | 0.61 % |
| 1998 | 14,657.43 | 3.77 % |
| 1999 | 14,976.00 | 2.17 % |
| 2000 | 15,195.36 | 1.46 % |
| 2001 | 16,295.47 | 7.24 % |
| 2002 | 17,541.08 | 7.64 % |
| 2003 | 19,396.27 | 10.58 % |
| 2004 | 16,797.02 | -13.40 % |
| 2005 | 20,638.58 | 22.87 % |
| 2006 | 20,543.78 | -0.46 % |
| 2007 | 20,582.36 | 0.19 % |
| 2008 | 17,075.00 | -17.04 % |
| 2009 | 17,910.50 | 4.89 % |
| 2010 | 19,784.38 | 10.46 % |
| 2011 | 21,629.07 | 9.32 % |
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