|
| year | consumption | change |
| 1980 | 2,530.32 | NA |
| 1981 | 2,540.71 | 0.41 % |
| 1982 | 2,488.34 | -2.06 % |
| 1983 | 2,713.37 | 9.04 % |
| 1984 | 2,665.00 | -1.78 % |
| 1985 | 2,504.46 | -6.02 % |
| 1986 | 2,400.78 | -4.14 % |
| 1987 | 2,183.67 | -9.04 % |
| 1988 | 2,720.58 | 24.59 % |
| 1989 | 2,300.54 | -15.44 % |
| 1990 | 2,384.58 | 3.65 % |
| 1991 | 2,321.63 | -2.64 % |
| 1992 | 1,990.79 | -14.25 % |
| 1993 | 2,553.81 | 28.28 % |
| 1994 | 2,620.41 | 2.61 % |
| 1995 | 2,215.69 | -15.45 % |
| 1996 | 1,840.13 | -16.95 % |
| 1997 | 2,580.55 | 40.24 % |
| 1998 | 2,564.95 | -0.60 % |
| 1999 | 2,729.03 | 6.40 % |
| 2000 | 2,490.82 | -8.73 % |
| 2001 | 2,920.46 | 17.25 % |
| 2002 | 2,371.00 | -18.81 % |
| 2003 | 3,991.37 | 68.34 % |
| 2004 | 4,436.14 | 11.14 % |
| 2005 | 4,733.50 | 6.70 % |
| 2006 | 4,373.87 | -7.60 % |
| 2007 | 3,665.64 | -16.19 % |
| 2008 | 4,431.76 | 20.90 % |
| 2009 | 3,296.28 | -25.62 % |
| 2010 | 2,918.37 | -11.46 % |
| 2011 | 3,248.51 | 11.31 % |
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