|
| year | consumption | change |
| 1980 | 22.05 | NA |
| 1981 | 33.07 | 50.00 % |
| 1982 | 49.60 | 50.00 % |
| 1983 | 143.30 | 188.89 % |
| 1984 | 165.35 | 15.38 % |
| 1985 | 166.45 | 0.67 % |
| 1986 | 136.69 | -17.88 % |
| 1987 | 180.78 | 32.26 % |
| 1988 | 170.86 | -5.49 % |
| 1989 | 188.50 | 10.32 % |
| 1990 | 189.60 | 0.58 % |
| 1991 | 189.60 | 0.00 % |
| 1992 | 187.39 | -1.16 % |
| 1993 | 189.60 | 1.18 % |
| 1994 | 189.60 | 0.00 % |
| 1995 | 190.70 | 0.58 % |
| 1996 | 190.70 | 0.00 % |
| 1997 | 191.80 | 0.58 % |
| 1998 | 191.80 | 0.00 % |
| 1999 | 192.90 | 0.57 % |
| 2000 | 174.39 | -9.60 % |
| 2001 | 180.01 | 3.22 % |
| 2002 | 201.61 | 12.00 % |
| 2003 | 208.23 | 3.28 % |
| 2004 | 255.51 | 22.71 % |
| 2005 | 206.72 | -19.10 % |
| 2006 | 187.28 | -9.40 % |
| 2007 | 200.68 | 7.15 % |
| 2008 | 198.40 | -1.14 % |
| 2009 | 246.63 | 24.31 % |
| 2010 | 248.10 | 0.60 % |
| 2011 | 248.10 | 0.00 % |
|
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