|
| 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 | 32.54 | NA |
| 1993 | 19.44 | -40.25 % |
| 1994 | 8.76 | -54.96 % |
| 1995 | 11.68 | 33.34 % |
| 1996 | 12.33 | 5.63 % |
| 1997 | 10.27 | -16.71 % |
| 1998 | 13.91 | 35.43 % |
| 1999 | 11.61 | -16.58 % |
| 2000 | 10.57 | -8.92 % |
| 2001 | 9.25 | -12.50 % |
| 2002 | 10.09 | 9.10 % |
| 2003 | 9.57 | -5.13 % |
| 2004 | 12.23 | 27.79 % |
| 2005 | 13.70 | 11.98 % |
| 2006 | 13.55 | -1.07 % |
| 2007 | 14.31 | 5.57 % |
| 2008 | 25.65 | 79.28 % |
| 2009 | 34.09 | 32.89 % |
| 2010 | 32.61 | -4.33 % |
| 2011 | 17.00 | -47.87 % |
|
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