|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 9.61 | NA |
| 1987 | 9.61 | 0.00 % |
| 1988 | 9.58 | -0.27 % |
| 1989 | 11.20 | 16.92 % |
| 1990 | 12.70 | 13.36 % |
| 1991 | 22.83 | 79.80 % |
| 1992 | 25.82 | 13.12 % |
| 1993 | 33.01 | 27.80 % |
| 1994 | 35.60 | 7.87 % |
| 1995 | 41.22 | 15.79 % |
| 1996 | 57.34 | 39.08 % |
| 1997 | 54.91 | -4.23 % |
| 1998 | 62.68 | 14.15 % |
| 1999 | 76.89 | 22.66 % |
| 2000 | 82.10 | 6.78 % |
| 2001 | 84.82 | 3.31 % |
| 2002 | 82.53 | -2.70 % |
| 2003 | 90.07 | 9.14 % |
| 2004 | 111.64 | 23.94 % |
| 2005 | 114.70 | 2.75 % |
| 2006 | 107.46 | -6.31 % |
| 2007 | 125.47 | 16.76 % |
| 2008 | 125.02 | -0.36 % |
| 2009 | 128.69 | 2.93 % |
| 2010 | 108.25 | -15.88 % |
|
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