|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 1.79 | NA |
| 1987 | 1.71 | -4.70 % |
| 1988 | 1.99 | 16.38 % |
| 1989 | 2.65 | 33.26 % |
| 1990 | 5.07 | 91.54 % |
| 1991 | 4.86 | -4.15 % |
| 1992 | 3.35 | -31.00 % |
| 1993 | 2.24 | -33.13 % |
| 1994 | 2.61 | 16.33 % |
| 1995 | 3.05 | 17.07 % |
| 1996 | 5.71 | 86.76 % |
| 1997 | 5.93 | 3.88 % |
| 1998 | 5.65 | -4.63 % |
| 1999 | 6.15 | 8.79 % |
| 2000 | 6.88 | 11.86 % |
| 2001 | 8.22 | 19.55 % |
| 2002 | 9.67 | 17.60 % |
| 2003 | 10.24 | 5.85 % |
| 2004 | 14.92 | 45.77 % |
| 2005 | 15.58 | 4.43 % |
| 2006 | 18.81 | 20.73 % |
| 2007 | 20.86 | 10.86 % |
| 2008 | 20.02 | -4.02 % |
| 2009 | 16.46 | -17.78 % |
| 2010 | 16.70 | 1.44 % |
|
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