|
| 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 | 65.44 | NA |
| 1993 | 62.82 | -4.00 % |
| 1994 | 78.63 | 25.15 % |
| 1995 | 88.46 | 12.51 % |
| 1996 | 77.88 | -11.96 % |
| 1997 | 80.86 | 3.83 % |
| 1998 | 89.61 | 10.82 % |
| 1999 | 90.90 | 1.45 % |
| 2000 | 85.54 | -5.90 % |
| 2001 | 85.54 | 0.00 % |
| 2002 | 89.49 | 4.62 % |
| 2003 | 91.34 | 2.07 % |
| 2004 | 95.50 | 4.55 % |
| 2005 | 95.76 | 0.27 % |
| 2006 | 103.33 | 7.90 % |
| 2007 | 98.02 | -5.14 % |
| 2008 | 95.26 | -2.82 % |
| 2009 | 90.16 | -5.35 % |
| 2010 | 82.77 | -8.19 % |
| 2011 | 113.00 | 36.52 % |
|
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