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Loading...
| year | consumption | change |
| 1980 | 51.00 | NA |
| 1981 | 55.00 | 7.84% |
| 1982 | 56.00 | 1.82% |
| 1983 | 59.00 | 5.36% |
| 1984 | 63.00 | 6.78% |
| 1985 | 65.00 | 3.17% |
| 1986 | 68.00 | 4.62% |
| 1987 | 70.00 | 2.94% |
| 1988 | 72.00 | 2.86% |
| 1989 | 71.00 | -1.39% |
| 1990 | 71.00 | 0.00% |
| 1991 | 65.00 | -8.45% |
| 1992 | .00 | -100.00% |
| 1993 | .00 | NA |
| 1994 | .00 | NA |
| 1995 | .00 | NA |
| 1996 | .00 | NA |
| 1997 | .00 | NA |
| 1998 | .00 | NA |
| 1999 | .00 | NA |
| 2000 | .00 | NA |
| 2001 | .00 | NA |
| 2002 | .00 | NA |
| 2003 | .00 | NA |
| 2004 | .00 | NA |
| 2005 | .00 | NA |
| 2006 | .00 | NA |
| 2007 | .00 | NA |
| 2008 | .00 | NA |
| 2009 | .00 | NA |
| 2010 | .00 | NA |
| 2011 | .00 | NA |
| 2012 | .00 | NA |
| 2013 | .00 | NA |
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