|
| 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 | 404.14 | NA |
| 1993 | 341.39 | -15.53 % |
| 1994 | 297.62 | -12.82 % |
| 1995 | 269.19 | -9.55 % |
| 1996 | 245.24 | -8.90 % |
| 1997 | 217.52 | -11.30 % |
| 1998 | 196.64 | -9.60 % |
| 1999 | 171.23 | -12.92 % |
| 2000 | 194.75 | 13.74 % |
| 2001 | 210.45 | 8.06 % |
| 2002 | 217.16 | 3.19 % |
| 2003 | 206.98 | -4.69 % |
| 2004 | 221.25 | 6.89 % |
| 2005 | 228.98 | 3.49 % |
| 2006 | 234.46 | 2.40 % |
| 2007 | 235.97 | 0.64 % |
| 2008 | 247.50 | 4.89 % |
| 2009 | 209.95 | -15.17 % |
| 2010 | 206.32 | -1.73 % |
| 2011 | 263.00 | 27.47 % |
|
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