|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | | NA |
| 1987 | | NA |
| 1988 | | NA |
| 1989 | | NA |
| 1990 | | NA |
| 1991 | | NA |
| 1992 | | NA |
| 1993 | 57.25 | NA |
| 1994 | 59.18 | 3.36 % |
| 1995 | 54.43 | -8.02 % |
| 1996 | 52.35 | -3.81 % |
| 1997 | 51.82 | -1.02 % |
| 1998 | 56.94 | 9.88 % |
| 1999 | 55.02 | -3.37 % |
| 2000 | 57.58 | 4.65 % |
| 2001 | 61.05 | 6.02 % |
| 2002 | 61.62 | 0.94 % |
| 2003 | 66.22 | 7.46 % |
| 2004 | 74.21 | 12.07 % |
| 2005 | 78.69 | 6.03 % |
| 2006 | 81.30 | 3.32 % |
| 2007 | 84.82 | 4.32 % |
| 2008 | 84.02 | -0.94 % |
| 2009 | 85.23 | 1.44 % |
| 2010 | 79.01 | -7.29 % |
|
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