|
| year | consumption | change |
| 1980 | 1,058.22 | NA |
| 1981 | 837.76 | -20.83 % |
| 1982 | 1,304.03 | 55.66 % |
| 1983 | 1,197.11 | -8.20 % |
| 1984 | 1,423.08 | 18.88 % |
| 1985 | 1,490.33 | 4.73 % |
| 1986 | 1,556.46 | 4.44 % |
| 1987 | 1,587.33 | 1.98 % |
| 1988 | 1,609.38 | 1.39 % |
| 1989 | 1,629.22 | 1.23 % |
| 1990 | 1,461.67 | -10.28 % |
| 1991 | 1,709.69 | 16.97 % |
| 1992 | 1,793.46 | 4.90 % |
| 1993 | 1,386.71 | -22.68 % |
| 1994 | 2,049.20 | 47.77 % |
| 1995 | 1,849.68 | -9.74 % |
| 1996 | 1,998.49 | 8.05 % |
| 1997 | 2,087.78 | 4.47 % |
| 1998 | 2,130.77 | 2.06 % |
| 1999 | 2,320.37 | 8.90 % |
| 2000 | 2,343.51 | 1.00 % |
| 2001 | 1,814.41 | -22.58 % |
| 2002 | 2,035.97 | 12.21 % |
| 2003 | 2,283.99 | 12.18 % |
| 2004 | 2,203.52 | -3.52 % |
| 2005 | 2,716.10 | 23.26 % |
| 2006 | 2,714.99 | -0.04 % |
| 2007 | 2,871.52 | 5.77 % |
| 2008 | 2,669.80 | -7.02 % |
| 2009 | 1,948.89 | -27.00 % |
| 2010 | 2,367.77 | 21.49 % |
| 2011 | 2,579.41 | 8.94 % |
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