|
| year | consumption | change |
| 1980 | 792.00 | NA |
| 1981 | 731.00 | -7.70 % |
| 1982 | 642.00 | -12.18 % |
| 1983 | 613.00 | -4.52 % |
| 1984 | 590.00 | -3.75 % |
| 1985 | 610.00 | 3.39 % |
| 1986 | 675.00 | 10.66 % |
| 1987 | 691.00 | 2.37 % |
| 1988 | 723.00 | 4.63 % |
| 1989 | 715.00 | -1.11 % |
| 1990 | 734.00 | 2.66 % |
| 1991 | 758.00 | 3.27 % |
| 1992 | 769.00 | 1.45 % |
| 1993 | 764.00 | -0.65 % |
| 1994 | 764.00 | 0.00 % |
| 1995 | 767.00 | 0.39 % |
| 1996 | 761.00 | -0.78 % |
| 1997 | 793.00 | 4.20 % |
| 1998 | 802.00 | 1.13 % |
| 1999 | 828.00 | 3.24 % |
| 2000 | 854.52 | 3.20 % |
| 2001 | 893.65 | 4.58 % |
| 2002 | 898.32 | 0.52 % |
| 2003 | 918.64 | 2.26 % |
| 2004 | 947.87 | 3.18 % |
| 2005 | 1,021.38 | 7.76 % |
| 2006 | 999.48 | -2.14 % |
| 2007 | 1,111.27 | 11.19 % |
| 2008 | 1,068.69 | -3.83 % |
| 2009 | 1,005.22 | -5.94 % |
| 2010 | 1,019.75 | 1.45 % |
| 2011 | 1,009.82 | -0.97 % |
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