|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | .07 | NA |
| 1987 | .07 | 0.00 % |
| 1988 | .09 | 32.98 % |
| 1989 | .09 | 0.27 % |
| 1990 | .09 | 0.00 % |
| 1991 | .12 | 25.00 % |
| 1992 | .12 | -0.27 % |
| 1993 | .12 | 0.27 % |
| 1994 | .12 | 0.00 % |
| 1995 | .14 | 20.00 % |
| 1996 | .12 | -16.89 % |
| 1997 | .12 | 0.27 % |
| 1998 | .14 | 20.00 % |
| 1999 | .14 | 0.01 % |
| 2000 | .19 | 32.97 % |
| 2001 | .19 | 0.27 % |
| 2002 | .19 | 0.00 % |
| 2003 | .21 | 12.50 % |
| 2004 | .23 | 10.81 % |
| 2005 | .26 | 10.30 % |
| 2006 | .23 | -9.09 % |
| 2007 | .26 | 10.00 % |
| 2008 | .26 | 0.00 % |
| 2009 | .26 | 0.00 % |
| 2010 | .26 | 0.00 % |
|
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