|
| year | consumption | change |
| 1980 | 2.47 | NA |
| 1981 | 3.18 | 28.74 % |
| 1982 | | NA |
| 1983 | 3.20 | NA |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | | NA |
| 1987 | 2.10 | NA |
| 1988 | 2.12 | 0.90 % |
| 1989 | 2.12 | 0.05 % |
| 1990 | | NA |
| 1991 | 1.37 | NA |
| 1992 | .85 | -38.34 % |
| 1993 | 1.06 | 24.98 % |
| 1994 | 1.06 | 0.09 % |
| 1995 | .71 | -33.02 % |
| 1996 | .71 | 0.00 % |
| 1997 | 1.77 | 148.70 % |
| 1998 | 1.77 | 0.00 % |
| 1999 | 1.77 | 0.00 % |
| 2000 | 1.77 | 0.00 % |
| 2001 | 1.77 | 0.00 % |
| 2002 | 1.77 | 0.00 % |
| 2003 | 1.77 | 0.00 % |
| 2004 | 1.77 | 0.00 % |
| 2005 | 1.77 | 0.00 % |
| 2006 | 2.12 | 20.00 % |
| 2007 | 1.27 | -40.00 % |
| 2008 | 19.78 | 1,455.56 % |
| 2009 | 19.78 | 0.00 % |
| 2010 | 19.78 | 0.00 % |
| 2011 | 7.42 | -62.50 % |
|
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