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Loading...
| year | production | consumption |
| 1980 | | |
| 1981 | | |
| 1982 | | |
| 1983 | | |
| 1984 | | |
| 1985 | | |
| 1986 | | |
| 1987 | | |
| 1988 | | |
| 1989 | | |
| 1990 | | |
| 1991 | | |
| 1992 | | |
| 1993 | .27 | .27 |
| 1994 | .39 | .39 |
| 1995 | .40 | .40 |
| 1996 | .37 | .37 |
| 1997 | .50 | .50 |
| 1998 | .57 | .57 |
| 1999 | .79 | .79 |
| 2000 | .69 | .69 |
| 2001 | .68 | .68 |
| 2002 | .66 | .66 |
| 2003 | .48 | .48 |
| 2004 | .69 | .69 |
| 2005 | .72 | .72 |
| 2006 | .93 | .93 |
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