|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 1.95 | NA |
| 1987 | 2.35 | 20.56 % |
| 1988 | 1.79 | -23.85 % |
| 1989 | 3.62 | 102.67 % |
| 1990 | 1.85 | -48.98 % |
| 1991 | 1.40 | -24.32 % |
| 1992 | 3.56 | 154.53 % |
| 1993 | 2.99 | -16.11 % |
| 1994 | 5.87 | 96.65 % |
| 1995 | 6.29 | 7.14 % |
| 1996 | 3.30 | -47.59 % |
| 1997 | 3.41 | 3.41 % |
| 1998 | 2.21 | -35.05 % |
| 1999 | 1.96 | -11.32 % |
| 2000 | 3.46 | 76.22 % |
| 2001 | 2.04 | -41.02 % |
| 2002 | 1.93 | -5.59 % |
| 2003 | 7.95 | 312.59 % |
| 2004 | 8.04 | 1.06 % |
| 2005 | 8.58 | 6.80 % |
| 2006 | 5.56 | -35.26 % |
| 2007 | 3.23 | -41.88 % |
| 2008 | 5.36 | 66.10 % |
| 2009 | 5.82 | 8.50 % |
| 2010 | 4.76 | -18.17 % |
|
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