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year | consumption | change |
1986 | 2.30 | NA |
1987 | 2.60 | 13.04% |
1988 | 2.90 | 11.54% |
1989 | 2.90 | 0.00% |
1990 | 3.40 | 17.24% |
1991 | 2.50 | -26.47% |
1992 | 3.20 | 28.00% |
1993 | 2.60 | -18.75% |
1994 | 2.50 | -3.85% |
1995 | 2.50 | 0.00% |
1996 | 2.60 | 4.00% |
1997 | 2.60 | 0.00% |
1998 | 2.60 | 0.00% |
1999 | 2.60 | 0.00% |
2000 | 3.10 | 19.23% |
2001 | 3.20 | 3.23% |
2002 | 3.40 | 6.25% |
2003 | 3.50 | 2.94% |
2004 | 3.70 | 5.71% |
2005 | 3.80 | 2.70% |
2006 | 4.00 | 5.26% |
2007 | 4.30 | 7.50% |
2008 | 3.00 | -30.23% |
2009 | 3.20 | 6.67% |
2010 | 3.70 | 15.63% |
2011 | 4.10 | 10.81% |
2012 | 5.40 | 31.71% |
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