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year | consumption | change |
1986 | 2.10 | NA |
1987 | 1.90 | -9.52% |
1988 | 2.00 | 5.26% |
1989 | 2.00 | 0.00% |
1990 | 2.00 | 0.00% |
1991 | 2.00 | 0.00% |
1992 | 2.00 | 0.00% |
1993 | 2.00 | 0.00% |
1994 | 2.00 | 0.00% |
1995 | 1.90 | -5.00% |
1996 | 1.90 | 0.00% |
1997 | 1.90 | 0.00% |
1998 | 1.80 | -5.26% |
1999 | 1.80 | 0.00% |
2000 | 1.70 | -5.56% |
2001 | 1.80 | 5.88% |
2002 | 1.90 | 5.56% |
2003 | 2.10 | 10.53% |
2004 | 2.10 | 0.00% |
2005 | 2.40 | 14.29% |
2006 | 3.30 | 37.50% |
2007 | 3.40 | 3.03% |
2008 | 1.60 | -52.94% |
2009 | 1.40 | -12.50% |
2010 | 1.30 | -7.14% |
2011 | 1.40 | 7.69% |
2012 | 1.40 | 0.00% |
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