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year | consumption | change |
1986 | 5.00 | NA |
1987 | 3.20 | -36.00% |
1988 | 3.20 | 0.00% |
1989 | 3.30 | 3.13% |
1990 | 3.30 | 0.00% |
1991 | 1.90 | -42.42% |
1992 | 1.50 | -21.05% |
1993 | 1.60 | 6.67% |
1994 | 1.60 | 0.00% |
1995 | 1.60 | 0.00% |
1996 | 1.60 | 0.00% |
1997 | 1.60 | 0.00% |
1998 | 1.60 | 0.00% |
1999 | 1.60 | 0.00% |
2000 | 1.50 | -6.25% |
2001 | 1.50 | 0.00% |
2002 | 1.50 | 0.00% |
2003 | 1.50 | 0.00% |
2004 | 1.50 | 0.00% |
2005 | 1.80 | 20.00% |
2006 | 1.80 | 0.00% |
2007 | 2.20 | 22.22% |
2008 | 2.20 | 0.00% |
2009 | 2.20 | 0.00% |
2010 | 2.10 | -4.55% |
2011 | 2.10 | 0.00% |
2012 | 2.10 | 0.00% |
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