|
| year | consumption | change |
| 1984 | 552.98 | NA |
| 1985 | 337.67 | -38.94 % |
| 1986 | 281.92 | -16.51 % |
| 1987 | 230.79 | -18.14 % |
| 1988 | 259.67 | 12.52 % |
| 1989 | 252.22 | -2.87 % |
| 1990 | 269.67 | 6.92 % |
| 1991 | 265.75 | -1.45 % |
| 1992 | 242.59 | -8.72 % |
| 1993 | 223.97 | -7.67 % |
| 1994 | 204.89 | -8.52 % |
| 1995 | 182.32 | -11.02 % |
| 1996 | 172.92 | -5.16 % |
| 1997 | 148.54 | -14.10 % |
| 1998 | 124.22 | -16.37 % |
| 1999 | 104.87 | -15.58 % |
| 2000 | 80.66 | -23.08 % |
| 2001 | 97.50 | 20.87 % |
| 2002 | 85.93 | -11.86 % |
| 2003 | 89.77 | 4.46 % |
| 2004 | 91.69 | 2.15 % |
| 2005 | 89.83 | -2.03 % |
| 2006 | 84.20 | -6.27 % |
| 2007 | 86.84 | 3.13 % |
| 2008 | 94.87 | 9.25 % |
| 2009 | 78.20 | -17.57 % |
| 2010 | 61.46 | -21.41 % |
|
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