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year | consumption | change |
1986 | 2.40 | NA |
1987 | 2.40 | 0.00% |
1988 | 1.90 | -20.83% |
1989 | 2.50 | 31.58% |
1990 | 2.60 | 4.00% |
1991 | 2.70 | 3.85% |
1992 | 1.90 | -29.63% |
1993 | 1.50 | -21.05% |
1994 | 1.40 | -6.67% |
1995 | 2.00 | 42.86% |
1996 | 2.00 | 0.00% |
1997 | 2.00 | 0.00% |
1998 | 2.00 | 0.00% |
1999 | 2.00 | 0.00% |
2000 | 2.10 | 5.00% |
2001 | 2.20 | 4.76% |
2002 | 2.20 | 0.00% |
2003 | 2.20 | 0.00% |
2004 | 2.50 | 13.64% |
2005 | 2.70 | 8.00% |
2006 | 2.40 | -11.11% |
2007 | 3.30 | 37.50% |
2008 | 4.30 | 30.30% |
2009 | 3.20 | -25.58% |
2010 | 1.70 | -46.88% |
2011 | 1.70 | 0.00% |
2012 | 1.70 | 0.00% |
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