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year | consumption | change |
1986 | 3.60 | NA |
1987 | 3.80 | 5.56% |
1988 | 4.10 | 7.89% |
1989 | 4.60 | 12.20% |
1990 | 4.50 | -2.17% |
1991 | 5.30 | 17.78% |
1992 | 6.10 | 15.09% |
1993 | 7.60 | 24.59% |
1994 | 5.80 | -23.68% |
1995 | 8.40 | 44.83% |
1996 | 9.90 | 17.86% |
1997 | 9.10 | -8.08% |
1998 | 12.00 | 31.87% |
1999 | 13.00 | 8.33% |
2000 | 13.00 | 0.00% |
2001 | 14.00 | 7.69% |
2002 | 15.00 | 7.14% |
2003 | 14.00 | -6.67% |
2004 | 13.00 | -7.14% |
2005 | 13.00 | 0.00% |
2006 | 14.00 | 7.69% |
2007 | 15.00 | 7.14% |
2008 | 15.00 | 0.00% |
2009 | 16.00 | 6.67% |
2010 | 17.00 | 6.25% |
2011 | 16.00 | -5.88% |
2012 | 17.00 | 6.25% |
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