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year | consumption | change |
1980 | 4.10 | NA |
1981 | 3.80 | -7.32% |
1982 | 3.70 | -2.63% |
1983 | 4.00 | 8.11% |
1984 | 4.70 | 17.50% |
1985 | 4.40 | -6.38% |
1986 | 3.60 | -18.18% |
1987 | 3.50 | -2.78% |
1988 | 3.70 | 5.71% |
1989 | 4.30 | 16.22% |
1990 | 4.20 | -2.33% |
1991 | 6.70 | 59.52% |
1992 | 4.80 | -28.36% |
1993 | 3.60 | -25.00% |
1994 | 4.10 | 13.89% |
1995 | 4.10 | 0.00% |
1996 | 4.20 | 2.44% |
1997 | 4.30 | 2.38% |
1998 | 4.30 | 0.00% |
1999 | 6.80 | 58.14% |
2000 | 9.50 | 39.71% |
2001 | 6.80 | -28.42% |
2002 | 8.80 | 29.41% |
2003 | 14.00 | 59.09% |
2004 | 15.00 | 7.14% |
2005 | 15.00 | 0.00% |
2006 | 16.00 | 6.67% |
2007 | 17.00 | 6.25% |
2008 | 8.80 | -48.24% |
2009 | 9.20 | 4.55% |
2010 | 16.00 | 73.91% |
2011 | 14.00 | -12.50% |
2012 | 13.00 | -7.14% |
2013 | 13.00 | 0.00% |
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