|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 1.64 | NA |
| 1987 | 2.86 | 74.46 % |
| 1988 | 1.54 | -46.08 % |
| 1989 | 5.29 | 243.03 % |
| 1990 | 5.27 | -0.41 % |
| 1991 | 5.02 | -4.70 % |
| 1992 | 5.31 | 5.69 % |
| 1993 | 4.84 | -8.84 % |
| 1994 | 5.48 | 13.19 % |
| 1995 | 2.48 | -54.83 % |
| 1996 | 2.09 | -15.68 % |
| 1997 | 2.05 | -1.95 % |
| 1998 | 2.63 | 28.33 % |
| 1999 | 5.39 | 105.22 % |
| 2000 | 2.55 | -52.64 % |
| 2001 | 1.31 | -48.61 % |
| 2002 | 2.72 | 107.64 % |
| 2003 | 1.96 | -28.15 % |
| 2004 | 2.08 | 6.45 % |
| 2005 | 2.07 | -0.68 % |
| 2006 | 2.70 | 30.56 % |
| 2007 | 3.34 | 23.64 % |
| 2008 | 4.05 | 21.31 % |
| 2009 | 3.47 | -14.45 % |
| 2010 | 1.30 | -62.40 % |
|
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