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Loading...
| year | consumption | change |
| 1980 | .00 | NA |
| 1981 | .00 | NA |
| 1982 | .00 | NA |
| 1983 | .00 | NA |
| 1984 | .00 | NA |
| 1985 | .00 | NA |
| 1986 | .00 | NA |
| 1987 | .00 | NA |
| 1988 | .00 | NA |
| 1989 | .00 | NA |
| 1990 | .00 | NA |
| 1991 | .00 | NA |
| 1992 | 2.10 | NA |
| 1993 | 2.80 | 33.33% |
| 1994 | 1.80 | -35.71% |
| 1995 | 3.50 | 94.44% |
| 1996 | 4.60 | 31.43% |
| 1997 | 3.90 | -15.22% |
| 1998 | 3.90 | 0.00% |
| 1999 | 3.90 | 0.00% |
| 2000 | 3.90 | 0.00% |
| 2001 | 3.90 | 0.00% |
| 2002 | 3.90 | 0.00% |
| 2003 | 4.90 | 25.64% |
| 2004 | 4.90 | 0.00% |
| 2005 | 3.50 | -28.57% |
| 2006 | 4.90 | 40.00% |
| 2007 | 4.80 | -2.04% |
| 2008 | 4.60 | -4.17% |
| 2009 | 3.50 | -23.91% |
| 2010 | 3.90 | 11.43% |
| 2011 | 3.50 | -10.26% |
| 2012 | 3.50 | 0.00% |
| 2013 | 3.90 | 11.43% |
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