|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | | NA |
| 1987 | | NA |
| 1988 | | NA |
| 1989 | | NA |
| 1990 | | NA |
| 1991 | | NA |
| 1992 | .17 | NA |
| 1993 | | NA |
| 1994 | .26 | NA |
| 1995 | .41 | 58.38 % |
| 1996 | .64 | 55.42 % |
| 1997 | .59 | -7.35 % |
| 1998 | 1.44 | 142.08 % |
| 1999 | 2.41 | 68.19 % |
| 2000 | 3.67 | 52.21 % |
| 2001 | .32 | -91.36 % |
| 2002 | .59 | 86.67 % |
| 2003 | .55 | -7.14 % |
| 2004 | .55 | -0.27 % |
| 2005 | .55 | 0.27 % |
| 2006 | .55 | 0.00 % |
| 2007 | .55 | 0.00 % |
| 2008 | .55 | 0.00 % |
| 2009 | .55 | 0.00 % |
| 2010 | .55 | 0.00 % |
|
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