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year | consumption | change |
1980 | 1.14 | NA |
1981 | 1.05 | -7.56% |
1982 | 1.03 | -1.81% |
1983 | 1.09 | 5.03% |
1984 | 1.06 | -2.30% |
1985 | 1.15 | 8.77% |
1986 | 1.16 | 0.87% |
1987 | 1.17 | 0.34% |
1988 | 1.19 | 1.71% |
1989 | 1.15 | -3.03% |
1990 | 1.18 | 2.52% |
1991 | 1.22 | 3.56% |
1992 | 1.23 | 0.98% |
1993 | 1.23 | -0.73% |
1994 | 1.25 | 1.63% |
1995 | 1.24 | -0.48% |
1996 | 1.22 | -1.86% |
1997 | 1.24 | 1.56% |
1998 | 1.27 | 2.51% |
1999 | 1.33 | 4.66% |
2000 | 1.30 | -2.19% |
2001 | 1.35 | 4.17% |
2002 | 1.28 | -4.89% |
2003 | 1.30 | 1.09% |
2004 | 1.29 | -0.46% |
2005 | 1.26 | -2.32% |
2006 | 1.29 | 1.82% |
2007 | 1.28 | -0.16% |
2008 | 1.31 | 1.87% |
2009 | 1.28 | -2.45% |
2010 | 1.31 | 2.43% |
2011 | 1.23 | -6.05% |
2012 | 1.27 | 3.75% |
2013 | 1.31 | 3.06% |
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