|
| year | consumption | change |
| 1980 | | NA |
| 1981 | | NA |
| 1982 | | NA |
| 1983 | | NA |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | | NA |
| 1987 | | NA |
| 1988 | | NA |
| 1989 | | NA |
| 1990 | | NA |
| 1991 | | NA |
| 1992 | 17.68 | NA |
| 1993 | 14.16 | -19.91 % |
| 1994 | 14.63 | 3.32 % |
| 1995 | 86.52 | 491.39 % |
| 1996 | 4.94 | -94.29 % |
| 1997 | 4.94 | 0.00 % |
| 1998 | 7.06 | 42.86 % |
| 1999 | 7.06 | 0.00 % |
| 2000 | 10.59 | 50.00 % |
| 2001 | 10.59 | 0.00 % |
| 2002 | 5.65 | -46.67 % |
| 2003 | 5.65 | 0.00 % |
| 2004 | 10.59 | 87.50 % |
| 2005 | 14.13 | 33.33 % |
| 2006 | 14.13 | 0.00 % |
| 2007 | 11.30 | -20.00 % |
| 2008 | 10.95 | -3.13 % |
| 2009 | 7.42 | -32.26 % |
| 2010 | 8.12 | 9.52 % |
| 2011 | 8.12 | 0.00 % |
|
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