|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | | NA |
| 1987 | | NA |
| 1988 | | NA |
| 1989 | | NA |
| 1990 | | NA |
| 1991 | | NA |
| 1992 | 115.92 | NA |
| 1993 | 89.36 | -22.92 % |
| 1994 | 68.92 | -22.88 % |
| 1995 | 74.10 | 7.52 % |
| 1996 | 77.98 | 5.25 % |
| 1997 | 68.44 | -12.24 % |
| 1998 | 50.44 | -26.30 % |
| 1999 | 40.39 | -19.91 % |
| 2000 | 58.09 | 43.82 % |
| 2001 | 66.14 | 13.85 % |
| 2002 | 49.75 | -24.78 % |
| 2003 | 48.11 | -3.29 % |
| 2004 | 51.02 | 6.06 % |
| 2005 | 54.78 | 7.37 % |
| 2006 | 68.28 | 24.63 % |
| 2007 | 64.81 | -5.08 % |
| 2008 | 64.85 | 0.06 % |
| 2009 | 59.21 | -8.70 % |
| 2010 | 59.96 | 1.27 % |
|
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