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year | consumption | change |
1986 | 1.20 | NA |
1987 | 1.30 | 8.33% |
1988 | 2.10 | 61.54% |
1989 | 2.40 | 14.29% |
1990 | 2.20 | -8.33% |
1991 | 2.30 | 4.55% |
1992 | 2.10 | -8.70% |
1993 | 2.20 | 4.76% |
1994 | 2.20 | 0.00% |
1995 | 2.20 | 0.00% |
1996 | 2.20 | 0.00% |
1997 | 2.40 | 9.09% |
1998 | 2.40 | 0.00% |
1999 | 2.40 | 0.00% |
2000 | 2.50 | 4.17% |
2001 | 2.50 | 0.00% |
2002 | 3.80 | 52.00% |
2003 | 3.50 | -7.89% |
2004 | 3.90 | 11.43% |
2005 | 3.80 | -2.56% |
2006 | 3.60 | -5.26% |
2007 | 3.90 | 8.33% |
2008 | 4.00 | 2.56% |
2009 | 4.20 | 5.00% |
2010 | 3.80 | -9.52% |
2011 | 3.80 | 0.00% |
2012 | 3.80 | 0.00% |
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