|
Loading...
| year | production | consumption |
| 1980 | .30 | .30 |
| 1981 | .30 | .30 |
| 1982 | .30 | .30 |
| 1983 | .30 | .30 |
| 1984 | .40 | .30 |
| 1985 | .40 | .30 |
| 1986 | .40 | .40 |
| 1987 | .40 | .40 |
| 1988 | .40 | .40 |
| 1989 | .40 | .40 |
| 1990 | .50 | .40 |
| 1991 | .50 | .40 |
| 1992 | .50 | .50 |
| 1993 | .50 | .50 |
| 1994 | .50 | .50 |
| 1995 | .50 | .50 |
| 1996 | .50 | .50 |
| 1997 | .50 | .50 |
| 1998 | .50 | .50 |
| 1999 | .60 | .50 |
| 2000 | .60 | .60 |
| 2001 | .60 | .60 |
| 2002 | .60 | .60 |
| 2003 | .60 | .60 |
| 2004 | .60 | .60 |
| 2005 | .70 | .60 |
| 2006 | .70 | .60 |
| 2007 | .70 | .60 |
| 2008 | .70 | .60 |
| 2009 | .70 | .60 |
| 2010 | .70 | .60 |
| 2011 | .70 | .60 |
| 2012 | .60 | .60 |
| 2013 | .60 | .60 |
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