|
| year | consumption | change |
| 1980 | 798.79 | NA |
| 1981 | 865.46 | 8.35 % |
| 1982 | 942.56 | 8.91 % |
| 1983 | 945.03 | 0.26 % |
| 1984 | 945.52 | 0.05 % |
| 1985 | 990.23 | 4.73 % |
| 1986 | 879.56 | -11.18 % |
| 1987 | 893.01 | 1.53 % |
| 1988 | 903.78 | 1.21 % |
| 1989 | 880.69 | -2.56 % |
| 1990 | 918.00 | 4.24 % |
| 1991 | 949.00 | 3.38 % |
| 1992 | 958.84 | 1.04 % |
| 1993 | 977.02 | 1.90 % |
| 1994 | 1,026.22 | 5.04 % |
| 1995 | 1,042.64 | 1.60 % |
| 1996 | 1,102.68 | 5.76 % |
| 1997 | 1,178.21 | 6.85 % |
| 1998 | 1,283.70 | 8.95 % |
| 1999 | 1,262.19 | -1.68 % |
| 2000 | 1,398.19 | 10.77 % |
| 2001 | 1,395.33 | -0.20 % |
| 2002 | 1,513.00 | 8.43 % |
| 2003 | 1,639.71 | 8.37 % |
| 2004 | 1,653.31 | 0.83 % |
| 2005 | 1,656.34 | 0.18 % |
| 2006 | 2,199.84 | 32.81 % |
| 2007 | 2,024.89 | -7.95 % |
| 2008 | 2,129.28 | 5.16 % |
| 2009 | 2,134.51 | 0.25 % |
| 2010 | 2,286.33 | 7.11 % |
| 2011 | 2,364.30 | 3.41 % |
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