|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | .02 | NA |
| 1987 | .02 | 0.00 % |
| 1988 | .02 | -0.24 % |
| 1989 | .02 | 0.24 % |
| 1990 | .02 | 0.00 % |
| 1991 | .02 | -5.53 % |
| 1992 | .02 | 5.60 % |
| 1993 | .02 | 0.24 % |
| 1994 | .02 | 0.00 % |
| 1995 | .02 | 0.00 % |
| 1996 | .02 | -0.24 % |
| 1997 | .02 | 0.24 % |
| 1998 | .02 | 0.00 % |
| 1999 | .02 | 0.05 % |
| 2000 | .02 | -0.28 % |
| 2001 | .02 | 0.28 % |
| 2002 | .02 | 0.00 % |
| 2003 | .02 | 0.00 % |
| 2004 | .02 | -0.28 % |
| 2005 | .02 | 0.28 % |
| 2006 | .02 | 0.00 % |
| 2007 | .04 | 100.00 % |
| 2008 | .01 | -75.59 % |
| 2009 | .01 | -51.06 % |
| 2010 | .01 | 0.00 % |
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