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year | production | consumption |
1980 | .06 | .09 |
1981 | .06 | .08 |
1982 | .06 | .08 |
1983 | .03 | .06 |
1984 | .02 | .05 |
1985 | .03 | .06 |
1986 | .05 | .08 |
1987 | .05 | .09 |
1988 | .05 | .09 |
1989 | .05 | .10 |
1990 | .06 | .10 |
1991 | .06 | .10 |
1992 | .07 | .11 |
1993 | .07 | .11 |
1994 | .07 | .12 |
1995 | .07 | .12 |
1996 | .08 | .12 |
1997 | .08 | .12 |
1998 | .05 | .10 |
1999 | .07 | .12 |
2000 | .08 | .14 |
2001 | .08 | .14 |
2002 | .07 | .13 |
2003 | .05 | .13 |
2004 | .07 | .15 |
2005 | .07 | .15 |
2006 | .07 | .15 |
2007 | .05 | .13 |
2008 | .07 | .15 |
2009 | .08 | .17 |
2010 | .08 | .20 |
2011 | .24 | .24 |
2012 | .25 | .25 |
2013 | .29 | .23 |
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