|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 51.71 | NA |
| 1987 | 63.29 | 22.40 % |
| 1988 | 62.05 | -1.96 % |
| 1989 | 57.00 | -8.13 % |
| 1990 | 93.38 | 63.81 % |
| 1991 | 92.41 | -1.04 % |
| 1992 | 83.24 | -9.92 % |
| 1993 | 91.61 | 10.05 % |
| 1994 | 92.16 | 0.60 % |
| 1995 | 95.67 | 3.80 % |
| 1996 | 90.58 | -5.31 % |
| 1997 | 98.09 | 8.29 % |
| 1998 | 100.11 | 2.06 % |
| 1999 | 96.06 | -4.05 % |
| 2000 | 29.25 | -69.55 % |
| 2001 | 32.92 | 12.56 % |
| 2002 | 32.25 | -2.04 % |
| 2003 | 29.46 | -8.65 % |
| 2004 | 16.07 | -45.44 % |
| 2005 | 16.82 | 4.64 % |
| 2006 | 9.18 | -45.44 % |
| 2007 | 8.94 | -2.60 % |
| 2008 | 8.55 | -4.30 % |
| 2009 | 8.71 | 1.85 % |
| 2010 | 9.93 | 14.00 % |
|
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