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year | consumption | change |
1986 | 9.50 | NA |
1987 | 10.00 | 5.26% |
1988 | 10.00 | 0.00% |
1989 | 11.00 | 10.00% |
1990 | 10.00 | -9.09% |
1991 | 13.00 | 30.00% |
1992 | 13.00 | 0.00% |
1993 | 12.00 | -7.69% |
1994 | 12.00 | 0.00% |
1995 | 15.00 | 25.00% |
1996 | 13.00 | -13.33% |
1997 | 17.00 | 30.77% |
1998 | 17.00 | 0.00% |
1999 | 16.00 | -5.88% |
2000 | 17.00 | 6.25% |
2001 | 17.00 | 0.00% |
2002 | 16.00 | -5.88% |
2003 | 16.00 | 0.00% |
2004 | 16.00 | 0.00% |
2005 | 7.00 | -56.25% |
2006 | 18.00 | 157.14% |
2007 | 19.00 | 5.56% |
2008 | 19.00 | 0.00% |
2009 | 20.00 | 5.26% |
2010 | 20.00 | 0.00% |
2011 | 20.00 | 0.00% |
2012 | 20.00 | 0.00% |
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