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year | production | consumption |
1987 | .10 | .10 |
1988 | .10 | .50 |
1989 | .10 | .40 |
1990 | .20 | .20 |
1991 | .30 | .30 |
1992 | .40 | .40 |
1993 | .10 | .10 |
1995 | .20 | .20 |
1996 | .10 | .20 |
1997 | .30 | .40 |
1998 | .40 | .40 |
1999 | .30 | .20 |
2000 | .30 | .50 |
2001 | .30 | .20 |
2002 | .30 | .30 |
2003 | .20 | .20 |
2004 | .20 | .20 |
2005 | .30 | .60 |
2006 | .30 | .50 |
2007 | .40 | .50 |
2008 | .30 | .30 |
2009 | .40 | .30 |
2010 | .50 | .70 |
2012 | .30 | .30 |
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