|
| year | consumption | change |
| 1984 | 166.04 | NA |
| 1985 | 160.73 | -3.20 % |
| 1986 | 141.33 | -12.07 % |
| 1987 | 138.58 | -1.94 % |
| 1988 | 138.51 | -0.05 % |
| 1989 | 123.34 | -10.96 % |
| 1990 | 71.60 | -41.95 % |
| 1991 | 68.46 | -4.38 % |
| 1992 | 65.07 | -4.96 % |
| 1993 | 73.50 | 12.95 % |
| 1994 | 69.12 | -5.95 % |
| 1995 | 71.66 | 3.67 % |
| 1996 | 78.42 | 9.45 % |
| 1997 | 79.02 | 0.76 % |
| 1998 | 88.86 | 12.45 % |
| 1999 | 82.30 | -7.38 % |
| 2000 | 77.23 | -6.16 % |
| 2001 | 80.98 | 4.86 % |
| 2002 | 51.93 | -35.88 % |
| 2003 | 63.03 | 21.38 % |
| 2004 | 73.39 | 16.44 % |
| 2005 | 77.61 | 5.76 % |
| 2006 | 61.01 | -21.39 % |
| 2007 | 38.02 | -37.68 % |
| 2008 | 20.21 | -46.84 % |
| 2009 | 23.90 | 18.27 % |
| 2010 | 26.26 | 9.87 % |
|
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