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year | consumption | change |
1986 | 4.70 | NA |
1987 | 4.90 | 4.26% |
1988 | 5.00 | 2.04% |
1989 | 4.90 | -2.00% |
1990 | 4.00 | -18.37% |
1991 | 1.90 | -52.50% |
1992 | 2.80 | 47.37% |
1993 | 2.30 | -17.86% |
1994 | 3.50 | 52.17% |
1995 | 3.60 | 2.86% |
1996 | 3.60 | 0.00% |
1997 | 4.10 | 13.89% |
1998 | 3.20 | -21.95% |
1999 | 2.90 | -9.38% |
2000 | 2.90 | 0.00% |
2001 | 2.50 | -13.79% |
2002 | 3.20 | 28.00% |
2003 | 3.40 | 6.25% |
2004 | 4.10 | 20.59% |
2005 | 3.60 | -12.20% |
2006 | 4.90 | 36.11% |
2007 | 3.70 | -24.49% |
2008 | 2.30 | -37.84% |
2009 | 1.30 | -43.48% |
2010 | 2.80 | 115.38% |
2011 | 2.80 | 0.00% |
2012 | 2.30 | -17.86% |
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