|
| year | consumption | change |
| 1980 | | NA |
| 1981 | | NA |
| 1982 | | NA |
| 1983 | | NA |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | | NA |
| 1987 | | NA |
| 1988 | | NA |
| 1989 | | NA |
| 1990 | | NA |
| 1991 | | NA |
| 1992 | 725.32 | NA |
| 1993 | 731.93 | 0.91 % |
| 1994 | 531.31 | -27.41 % |
| 1995 | 410.06 | -22.82 % |
| 1996 | 379.20 | -7.53 % |
| 1997 | 300.93 | -20.64 % |
| 1998 | 259.04 | -13.92 % |
| 1999 | 210.54 | -18.72 % |
| 2000 | 158.73 | -24.61 % |
| 2001 | 143.30 | -9.72 % |
| 2002 | 246.92 | 72.31 % |
| 2003 | 314.16 | 27.23 % |
| 2004 | 306.44 | -2.46 % |
| 2005 | 336.21 | 9.71 % |
| 2006 | 466.28 | 38.69 % |
| 2007 | 445.22 | -4.52 % |
| 2008 | 375.67 | -15.62 % |
| 2009 | 277.34 | -26.17 % |
| 2010 | 354.94 | 27.98 % |
| 2011 | 406.75 | 14.60 % |
|
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