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year | consumption | change |
1986 | 1.90 | NA |
1987 | 2.00 | 5.26% |
1988 | 2.00 | 0.00% |
1989 | 2.40 | 20.00% |
1990 | 2.50 | 4.17% |
1991 | 2.70 | 8.00% |
1992 | 2.90 | 7.41% |
1993 | 2.90 | 0.00% |
1994 | 2.90 | 0.00% |
1995 | 2.90 | 0.00% |
1996 | 2.90 | 0.00% |
1997 | 3.40 | 17.24% |
1998 | 3.40 | 0.00% |
1999 | 3.40 | 0.00% |
2000 | 4.90 | 44.12% |
2001 | 4.10 | -16.33% |
2002 | 4.10 | 0.00% |
2003 | 4.30 | 4.88% |
2004 | 5.40 | 25.58% |
2005 | 5.70 | 5.56% |
2006 | 6.00 | 5.26% |
2007 | 6.20 | 3.33% |
2008 | 8.50 | 37.10% |
2009 | 8.20 | -3.53% |
2010 | 8.70 | 6.10% |
2011 | 8.20 | -5.75% |
2012 | 8.20 | 0.00% |
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