|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | | NA |
| 1987 | | NA |
| 1988 | .09 | NA |
| 1989 | .03 | -68.99 % |
| 1990 | .03 | 0.55 % |
| 1991 | .10 | 254.69 % |
| 1992 | .02 | -83.16 % |
| 1993 | .02 | 44.11 % |
| 1994 | | NA |
| 1995 | | NA |
| 1996 | | NA |
| 1997 | | NA |
| 1998 | | NA |
| 1999 | | NA |
| 2000 | 1.14 | NA |
| 2001 | 1.14 | 0.27 % |
| 2002 | 1.14 | 0.00 % |
| 2003 | 1.19 | 3.70 % |
| 2004 | 1.25 | 5.07 % |
| 2005 | 1.14 | -8.22 % |
| 2006 | 1.29 | 12.96 % |
| 2007 | 1.31 | 1.64 % |
| 2008 | 1.33 | 1.61 % |
| 2009 | 1.36 | 1.59 % |
| 2010 | 1.36 | 0.00 % |
|
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