|
| year | consumption | change |
| 1980 | 610.00 | NA |
| 1981 | 670.00 | 9.84 % |
| 1982 | 720.00 | 7.46 % |
| 1983 | 790.00 | 9.72 % |
| 1984 | 850.00 | 7.59 % |
| 1985 | 939.00 | 10.47 % |
| 1986 | 973.99 | 3.73 % |
| 1987 | 975.00 | 0.10 % |
| 1988 | 990.00 | 1.54 % |
| 1989 | 950.00 | -4.04 % |
| 1990 | 1,106.95 | 16.52 % |
| 1991 | 1,158.93 | 4.70 % |
| 1992 | 1,219.12 | 5.19 % |
| 1993 | 1,260.21 | 3.37 % |
| 1994 | 1,286.27 | 2.07 % |
| 1995 | 1,254.54 | -2.47 % |
| 1996 | 1,331.68 | 6.15 % |
| 1997 | 1,383.60 | 3.90 % |
| 1998 | 1,439.36 | 4.03 % |
| 1999 | 1,479.22 | 2.77 % |
| 2000 | 1,537.10 | 3.91 % |
| 2001 | 1,606.30 | 4.50 % |
| 2002 | 1,676.25 | 4.35 % |
| 2003 | 1,774.59 | 5.87 % |
| 2004 | 1,884.41 | 6.19 % |
| 2005 | 1,963.64 | 4.20 % |
| 2006 | 2,020.02 | 2.87 % |
| 2007 | 2,144.45 | 6.16 % |
| 2008 | 1,979.90 | -7.67 % |
| 2009 | 2,194.54 | 10.84 % |
| 2010 | 2,371.38 | 8.06 % |
| 2011 | 2,986.00 | 25.92 % |
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