|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | | NA |
| 1987 | | NA |
| 1988 | | NA |
| 1989 | | NA |
| 1990 | | NA |
| 1991 | | NA |
| 1992 | | NA |
| 1993 | | NA |
| 1994 | .15 | NA |
| 1995 | .15 | 0.00 % |
| 1996 | .15 | 0.00 % |
| 1997 | .15 | 0.00 % |
| 1998 | .20 | 33.33 % |
| 1999 | .20 | 0.00 % |
| 2000 | .20 | 0.00 % |
| 2001 | .20 | 0.00 % |
| 2002 | .20 | 0.00 % |
| 2003 | .20 | 0.00 % |
| 2004 | .20 | 0.00 % |
| 2005 | .20 | 0.00 % |
| 2006 | .20 | 0.35 % |
| 2007 | .25 | 24.56 % |
| 2008 | .26 | 5.20 % |
| 2009 | .20 | -23.68 % |
| 2010 | .20 | 0.00 % |
|
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