|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 27.18 | NA |
| 1987 | 34.26 | 26.04 % |
| 1988 | 37.35 | 9.01 % |
| 1989 | 36.82 | -1.41 % |
| 1990 | 38.44 | 4.40 % |
| 1991 | 48.00 | 24.88 % |
| 1992 | 45.36 | -5.50 % |
| 1993 | 63.78 | 40.60 % |
| 1994 | 64.44 | 1.03 % |
| 1995 | 65.52 | 1.68 % |
| 1996 | 64.86 | -1.01 % |
| 1997 | 61.56 | -5.09 % |
| 1998 | 66.55 | 8.09 % |
| 1999 | 72.29 | 8.64 % |
| 2000 | 68.04 | -5.89 % |
| 2001 | 75.51 | 10.98 % |
| 2002 | 71.87 | -4.81 % |
| 2003 | 58.63 | -18.42 % |
| 2004 | 83.33 | 42.13 % |
| 2005 | 56.01 | -32.79 % |
| 2006 | 61.09 | 9.06 % |
| 2007 | 97.44 | 59.51 % |
| 2008 | 99.60 | 2.22 % |
| 2009 | 78.67 | -21.01 % |
| 2010 | 87.56 | 11.29 % |
|
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