|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | .13 | NA |
| 1987 | .14 | 7.60 % |
| 1988 | .09 | -36.52 % |
| 1989 | .02 | -79.95 % |
| 1990 | | NA |
| 1991 | .15 | NA |
| 1992 | .15 | -0.27 % |
| 1993 | .15 | 0.27 % |
| 1994 | .15 | 0.00 % |
| 1995 | .15 | 0.00 % |
| 1996 | .16 | 12.19 % |
| 1997 | .16 | 0.27 % |
| 1998 | .16 | 0.00 % |
| 1999 | .16 | 0.01 % |
| 2000 | .18 | 10.81 % |
| 2001 | .18 | 0.27 % |
| 2002 | .18 | 0.00 % |
| 2003 | .18 | 0.00 % |
| 2004 | .18 | -0.27 % |
| 2005 | .15 | -19.78 % |
| 2006 | .09 | -38.75 % |
| 2007 | .07 | -18.36 % |
| 2008 | .07 | -5.36 % |
| 2009 | .04 | -44.53 % |
| 2010 | .04 | 0.00 % |
|
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