|
| year | consumption | change |
| 1980 | 71.65 | NA |
| 1981 | 52.91 | -26.15 % |
| 1982 | 67.24 | 27.08 % |
| 1983 | 48.50 | -27.87 % |
| 1984 | 45.19 | -6.82 % |
| 1985 | 36.38 | -19.51 % |
| 1986 | 30.86 | -15.15 % |
| 1987 | 30.86 | 0.00 % |
| 1988 | 17.64 | -42.86 % |
| 1989 | 12.13 | -31.25 % |
| 1990 | 19.84 | 63.64 % |
| 1991 | 12.13 | -38.89 % |
| 1992 | 13.23 | 9.09 % |
| 1993 | 16.53 | 25.00 % |
| 1994 | 18.74 | 13.33 % |
| 1995 | 18.74 | 0.00 % |
| 1996 | 18.74 | 0.00 % |
| 1997 | 18.74 | 0.00 % |
| 1998 | 14.22 | -24.12 % |
| 1999 | 60.55 | 325.81 % |
| 2000 | 68.56 | 13.24 % |
| 2001 | 51.57 | -24.79 % |
| 2002 | 75.00 | 45.45 % |
| 2003 | 70.61 | -5.85 % |
| 2004 | 67.13 | -4.93 % |
| 2005 | 65.26 | -2.79 % |
| 2006 | 65.15 | -0.17 % |
| 2007 | 67.46 | 3.55 % |
| 2008 | 56.63 | -16.06 % |
| 2009 | 52.91 | -6.56 % |
| 2010 | 55.12 | 4.17 % |
| 2011 | 55.12 | 0.00 % |
|
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