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year | production | consumption |
1992 | .18 | .30 |
1993 | .18 | .26 |
1994 | .18 | .25 |
1995 | .15 | .21 |
1996 | .15 | .23 |
1997 | .14 | .22 |
1998 | .15 | .23 |
1999 | .16 | .24 |
2000 | .14 | .24 |
2001 | .15 | .25 |
2002 | .16 | .25 |
2003 | .17 | .27 |
2004 | .17 | .27 |
2005 | .17 | .28 |
2006 | .17 | .28 |
2007 | .17 | .27 |
2008 | .17 | .21 |
2009 | .16 | .19 |
2010 | .16 | .19 |
2011 | .16 | .19 |
2012 | .17 | .20 |
2013 | .17 | .21 |
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