|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | | NA |
| 1987 | | NA |
| 1988 | | NA |
| 1989 | | NA |
| 1990 | 4.10 | NA |
| 1991 | | NA |
| 1992 | 1.55 | NA |
| 1993 | 1.84 | 19.21 % |
| 1994 | 1.69 | -8.41 % |
| 1995 | 1.69 | 0.00 % |
| 1996 | 1.68 | -0.27 % |
| 1997 | 1.69 | 0.27 % |
| 1998 | 1.69 | 0.00 % |
| 1999 | 7.36 | 335.75 % |
| 2000 | 5.52 | -24.93 % |
| 2001 | 7.81 | 41.35 % |
| 2002 | 8.01 | 2.62 % |
| 2003 | 8.30 | 3.57 % |
| 2004 | 8.76 | 5.62 % |
| 2005 | 8.79 | 0.27 % |
| 2006 | 9.54 | 8.60 % |
| 2007 | 10.04 | 5.14 % |
| 2008 | 10.22 | 1.83 % |
| 2009 | 11.00 | 7.60 % |
| 2010 | 11.79 | 7.25 % |
|
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