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year | consumption | change |
1986 | 4.50 | NA |
1987 | 3.60 | -20.00% |
1988 | 3.60 | 0.00% |
1989 | 2.20 | -38.89% |
1990 | 2.20 | 0.00% |
1991 | 2.40 | 9.09% |
1992 | 1.50 | -37.50% |
1993 | 3.40 | 126.67% |
1994 | 3.30 | -2.94% |
1995 | 1.70 | -48.48% |
1996 | 1.70 | 0.00% |
1997 | 1.80 | 5.88% |
1998 | 2.20 | 22.22% |
1999 | 3.00 | 36.36% |
2000 | 2.60 | -13.33% |
2001 | 2.80 | 7.69% |
2002 | 2.80 | 0.00% |
2003 | 2.50 | -10.71% |
2004 | 1.70 | -32.00% |
2005 | 2.40 | 41.18% |
2006 | 1.70 | -29.17% |
2007 | 1.70 | 0.00% |
2008 | 1.80 | 5.88% |
2009 | 2.50 | 38.89% |
2010 | 2.50 | 0.00% |
2011 | 2.50 | 0.00% |
2012 | 2.50 | 0.00% |
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