|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 3.87 | NA |
| 1987 | 8.84 | 128.78 % |
| 1988 | 8.02 | -9.36 % |
| 1989 | 12.47 | 55.53 % |
| 1990 | 16.48 | 32.23 % |
| 1991 | 17.50 | 6.16 % |
| 1992 | 21.86 | 24.92 % |
| 1993 | 19.77 | -9.57 % |
| 1994 | 13.54 | -31.51 % |
| 1995 | 20.24 | 49.51 % |
| 1996 | 20.27 | 0.14 % |
| 1997 | 75.47 | 272.31 % |
| 1998 | 38.51 | -48.98 % |
| 1999 | 44.98 | 16.81 % |
| 2000 | 40.27 | -10.48 % |
| 2001 | 37.82 | -6.07 % |
| 2002 | 45.71 | 20.86 % |
| 2003 | 42.61 | -6.79 % |
| 2004 | 45.38 | 6.50 % |
| 2005 | 49.47 | 9.03 % |
| 2006 | 57.23 | 15.67 % |
| 2007 | 44.59 | -22.09 % |
| 2008 | 38.20 | -14.33 % |
| 2009 | 64.40 | 68.57 % |
| 2010 | 72.77 | 13.00 % |
|
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