|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 2.42 | NA |
| 1987 | 2.23 | -7.78 % |
| 1988 | | NA |
| 1989 | 2.07 | NA |
| 1990 | 2.14 | 3.16 % |
| 1991 | 1.94 | -9.44 % |
| 1992 | 1.96 | 1.24 % |
| 1993 | 1.85 | -5.36 % |
| 1994 | | NA |
| 1995 | 1.75 | NA |
| 1996 | 1.70 | -2.86 % |
| 1997 | 1.48 | -12.88 % |
| 1998 | .95 | -35.74 % |
| 1999 | .89 | -5.97 % |
| 2000 | .80 | -10.26 % |
| 2001 | .95 | 18.74 % |
| 2002 | 1.06 | 11.74 % |
| 2003 | .62 | -41.75 % |
| 2004 | .40 | -35.46 % |
| 2005 | 33.72 | 8,321.93 % |
| 2006 | 16.96 | -49.69 % |
| 2007 | 20.52 | 20.99 % |
| 2008 | .25 | -98.76 % |
| 2009 | .31 | 22.04 % |
| 2010 | .23 | -24.89 % |
|
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