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year | consumption | change |
1986 | 1.80 | NA |
1987 | 1.70 | -5.56% |
1988 | 2.00 | 17.65% |
1989 | 2.10 | 5.00% |
1990 | 2.30 | 9.52% |
1991 | 2.70 | 17.39% |
1992 | 3.20 | 18.52% |
1993 | 3.00 | -6.25% |
1994 | 3.10 | 3.33% |
1995 | 3.00 | -3.23% |
1996 | 3.00 | 0.00% |
1997 | 3.00 | 0.00% |
1998 | 4.20 | 40.00% |
1999 | 4.20 | 0.00% |
2000 | 4.20 | 0.00% |
2001 | 4.80 | 14.29% |
2002 | 5.00 | 4.17% |
2003 | 5.00 | 0.00% |
2004 | 5.10 | 2.00% |
2005 | 5.30 | 3.92% |
2006 | 5.10 | -3.77% |
2007 | 5.20 | 1.96% |
2008 | 5.30 | 1.92% |
2009 | 7.40 | 39.62% |
2010 | 7.40 | 0.00% |
2011 | 7.40 | 0.00% |
2012 | 7.40 | 0.00% |
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