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Loading...
| year | consumption | change |
| 1986 | 1.90 | NA |
| 1987 | 1.50 | -21.05% |
| 1988 | 1.00 | -33.33% |
| 1989 | .90 | -10.00% |
| 1990 | 2.30 | 155.56% |
| 1991 | .50 | -78.26% |
| 1992 | .40 | -20.00% |
| 1993 | .40 | 0.00% |
| 1994 | .30 | -25.00% |
| 1995 | .00 | -100.00% |
| 1996 | .00 | NA |
| 1997 | .00 | NA |
| 1998 | .00 | NA |
| 1999 | .00 | NA |
| 2000 | .00 | NA |
| 2001 | .00 | NA |
| 2002 | .00 | NA |
| 2003 | .00 | NA |
| 2004 | .00 | NA |
| 2005 | .00 | NA |
| 2006 | .00 | NA |
| 2007 | .00 | NA |
| 2008 | .00 | NA |
| 2009 | .00 | NA |
| 2010 | .00 | NA |
| 2011 | .00 | NA |
| 2012 | .00 | NA |
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