|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 6.91 | NA |
| 1987 | 5.78 | -16.33 % |
| 1988 | 3.60 | -37.68 % |
| 1989 | 4.12 | 14.30 % |
| 1990 | 5.47 | 32.82 % |
| 1991 | 8.53 | 56.10 % |
| 1992 | 8.66 | 1.45 % |
| 1993 | 8.36 | -3.42 % |
| 1994 | 16.09 | 92.40 % |
| 1995 | 15.02 | -6.63 % |
| 1996 | 10.49 | -30.16 % |
| 1997 | 11.83 | 12.79 % |
| 1998 | 9.63 | -18.60 % |
| 1999 | 12.77 | 32.60 % |
| 2000 | 9.99 | -21.81 % |
| 2001 | 8.00 | -19.95 % |
| 2002 | 10.16 | 27.12 % |
| 2003 | | NA |
| 2004 | 18.98 | NA |
| 2005 | 20.49 | 7.94 % |
| 2006 | 23.79 | 16.12 % |
| 2007 | 26.53 | 11.50 % |
| 2008 | 35.34 | 33.22 % |
| 2009 | 20.86 | -40.99 % |
| 2010 | 28.21 | 35.26 % |
|
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