|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 6.81 | NA |
| 1987 | 6.95 | 2.04 % |
| 1988 | 6.54 | -5.85 % |
| 1989 | 6.64 | 1.52 % |
| 1990 | 6.74 | 1.54 % |
| 1991 | 6.34 | -6.06 % |
| 1992 | 2.55 | -59.79 % |
| 1993 | 2.45 | -3.74 % |
| 1994 | 2.37 | -3.33 % |
| 1995 | 2.29 | -3.45 % |
| 1996 | 2.20 | -3.83 % |
| 1997 | 2.08 | -5.30 % |
| 1998 | 2.00 | -3.92 % |
| 1999 | 2.00 | 0.00 % |
| 2000 | 1.94 | -3.33 % |
| 2001 | 1.84 | -5.00 % |
| 2002 | 1.88 | 2.22 % |
| 2003 | 1.51 | -19.57 % |
| 2004 | 1.69 | 11.86 % |
| 2005 | 1.90 | 12.36 % |
| 2006 | 1.84 | -3.23 % |
| 2007 | 1.88 | 2.22 % |
| 2008 | 2.45 | 30.43 % |
| 2009 | 10.26 | 318.33 % |
| 2010 | 10.26 | 0.00 % |
|
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