|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | | NA |
| 1987 | | NA |
| 1988 | | NA |
| 1989 | | NA |
| 1990 | | NA |
| 1991 | | NA |
| 1992 | 55.67 | NA |
| 1993 | 82.92 | 48.95 % |
| 1994 | 77.40 | -6.66 % |
| 1995 | 65.37 | -15.54 % |
| 1996 | 74.40 | 13.81 % |
| 1997 | 58.66 | -21.16 % |
| 1998 | 77.77 | 32.59 % |
| 1999 | 76.33 | -1.85 % |
| 2000 | 43.22 | -43.38 % |
| 2001 | 41.08 | -4.94 % |
| 2002 | 41.67 | 1.44 % |
| 2003 | 44.11 | 5.86 % |
| 2004 | 41.39 | -6.17 % |
| 2005 | 35.42 | -14.44 % |
| 2006 | 44.46 | 25.54 % |
| 2007 | 29.29 | -34.13 % |
| 2008 | 12.57 | -57.07 % |
| 2009 | 6.28 | -50.06 % |
| 2010 | 3.15 | -49.76 % |
|
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