|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | | NA |
| 1987 | | NA |
| 1988 | | NA |
| 1989 | | NA |
| 1990 | | NA |
| 1991 | | NA |
| 1992 | 56.79 | NA |
| 1993 | 50.33 | -11.38 % |
| 1994 | 50.86 | 1.05 % |
| 1995 | 57.36 | 12.78 % |
| 1996 | 36.98 | -35.53 % |
| 1997 | 36.61 | -1.00 % |
| 1998 | 41.25 | 12.67 % |
| 1999 | 39.27 | -4.81 % |
| 2000 | 33.52 | -14.65 % |
| 2001 | 52.91 | 57.87 % |
| 2002 | 34.16 | -35.44 % |
| 2003 | 35.25 | 3.18 % |
| 2004 | 34.99 | -0.74 % |
| 2005 | 33.89 | -3.12 % |
| 2006 | 34.77 | 2.60 % |
| 2007 | 37.55 | 7.97 % |
| 2008 | 22.83 | -39.18 % |
| 2009 | 23.01 | 0.78 % |
| 2010 | 19.88 | -13.59 % |
|
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