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year | consumption | change |
1986 | 2.30 | NA |
1987 | 2.90 | 26.09% |
1988 | 3.00 | 3.45% |
1989 | 2.40 | -20.00% |
1990 | 1.80 | -25.00% |
1991 | 2.50 | 38.89% |
1992 | 2.30 | -8.00% |
1993 | 1.90 | -17.39% |
1994 | 2.80 | 47.37% |
1995 | 2.80 | 0.00% |
1996 | 4.30 | 53.57% |
1997 | 2.20 | -48.84% |
1998 | 2.20 | 0.00% |
1999 | 3.00 | 36.36% |
2000 | 1.70 | -43.33% |
2001 | 2.10 | 23.53% |
2002 | 2.30 | 9.52% |
2003 | 2.50 | 8.70% |
2004 | 3.40 | 36.00% |
2005 | 3.30 | -2.94% |
2006 | 2.40 | -27.27% |
2007 | 4.00 | 66.67% |
2008 | 6.50 | 62.50% |
2009 | 1.30 | -80.00% |
2010 | 1.50 | 15.38% |
2011 | 1.10 | -26.67% |
2012 | .40 | -63.64% |
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