|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | .06 | NA |
| 1987 | .06 | 0.00 % |
| 1988 | .12 | 99.46 % |
| 1989 | .12 | 0.28 % |
| 1990 | .12 | 0.00 % |
| 1991 | .12 | 0.00 % |
| 1992 | .12 | -0.28 % |
| 1993 | .14 | 16.98 % |
| 1994 | .14 | 0.00 % |
| 1995 | .16 | 13.98 % |
| 1996 | .16 | 0.00 % |
| 1997 | .16 | 0.27 % |
| 1998 | .16 | 0.00 % |
| 1999 | .16 | 0.01 % |
| 2000 | .18 | 12.19 % |
| 2001 | .22 | 22.56 % |
| 2002 | .25 | 9.09 % |
| 2003 | .27 | 8.33 % |
| 2004 | .41 | 53.42 % |
| 2005 | .27 | -34.82 % |
| 2006 | .45 | 69.23 % |
| 2007 | .47 | 4.55 % |
| 2008 | .52 | 11.30 % |
| 2009 | .53 | 0.78 % |
| 2010 | .53 | 0.00 % |
|
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