|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 7.05 | NA |
| 1987 | 9.67 | 37.08 % |
| 1988 | 12.35 | 27.77 % |
| 1989 | 10.15 | -17.82 % |
| 1990 | 9.76 | -3.84 % |
| 1991 | 6.17 | -36.76 % |
| 1992 | 6.83 | 10.63 % |
| 1993 | 6.85 | 0.28 % |
| 1994 | 6.93 | 1.19 % |
| 1995 | 5.94 | -14.31 % |
| 1996 | 5.95 | 0.25 % |
| 1997 | 6.89 | 15.71 % |
| 1998 | 6.48 | -5.93 % |
| 1999 | 6.89 | 6.29 % |
| 2000 | 4.93 | -28.38 % |
| 2001 | 2.82 | -42.82 % |
| 2002 | 2.43 | -13.78 % |
| 2003 | 2.45 | 0.84 % |
| 2004 | 5.16 | 110.26 % |
| 2005 | 5.13 | -0.52 % |
| 2006 | 5.13 | 0.00 % |
| 2007 | 5.11 | -0.40 % |
| 2008 | 5.87 | 14.80 % |
| 2009 | 4.60 | -21.60 % |
| 2010 | 4.84 | 5.33 % |
|
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