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year | production | consumption |
1980 | .04 | .22 |
1981 | .04 | .22 |
1982 | .03 | .21 |
1983 | .03 | .22 |
1984 | .03 | .21 |
1985 | .03 | .23 |
1986 | .03 | .25 |
1987 | .03 | .25 |
1988 | .03 | .26 |
1989 | .03 | .29 |
1990 | .03 | .31 |
1991 | .03 | .31 |
1992 | .03 | .32 |
1993 | .02 | .34 |
1994 | .03 | .38 |
1995 | .03 | .37 |
1996 | .04 | .39 |
1997 | .03 | .41 |
1998 | .02 | .40 |
1999 | .01 | .43 |
2000 | .01 | .45 |
2001 | .01 | .48 |
2002 | .01 | .49 |
2003 | .02 | .49 |
2004 | .02 | .49 |
2005 | .02 | .51 |
2006 | .02 | .54 |
2007 | .01 | .55 |
2008 | .02 | .63 |
2009 | .03 | .65 |
2010 | .04 | .73 |
2011 | .03 | .76 |
2012 | .03 | .79 |
2013 | .04 | .64 |
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