|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | | NA |
| 1987 | | NA |
| 1988 | | NA |
| 1989 | | NA |
| 1990 | | NA |
| 1991 | | NA |
| 1992 | 14.38 | NA |
| 1993 | 18.27 | 27.09 % |
| 1994 | 18.70 | 2.34 % |
| 1995 | 14.32 | -23.39 % |
| 1996 | 9.31 | -35.00 % |
| 1997 | 17.96 | 92.93 % |
| 1998 | 7.32 | -59.26 % |
| 1999 | 7.34 | 0.32 % |
| 2000 | 14.01 | 90.82 % |
| 2001 | 21.08 | 50.45 % |
| 2002 | 19.95 | -5.33 % |
| 2003 | 18.71 | -6.25 % |
| 2004 | 18.92 | 1.16 % |
| 2005 | 19.69 | 4.06 % |
| 2006 | 23.45 | 19.11 % |
| 2007 | 33.06 | 40.96 % |
| 2008 | 23.81 | -27.98 % |
| 2009 | 21.22 | -10.87 % |
| 2010 | 20.63 | -2.80 % |
|
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