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Loading...
| year | production | consumption |
| 1980 | .00 | .00 |
| 1981 | .00 | .00 |
| 1982 | .00 | .00 |
| 1983 | .00 | .00 |
| 1984 | .00 | .00 |
| 1985 | .00 | .00 |
| 1986 | .00 | .00 |
| 1987 | .00 | .00 |
| 1988 | .01 | .01 |
| 1989 | .00 | .00 |
| 1990 | .00 | .00 |
| 1991 | .00 | .00 |
| 1992 | .14 | .14 |
| 1993 | .13 | .13 |
| 1994 | .11 | .11 |
| 1995 | .13 | .13 |
| 1996 | .15 | .15 |
| 1997 | .14 | .14 |
| 1998 | .22 | .22 |
| 1999 | .34 | .34 |
| 2000 | .58 | .58 |
| 2001 | .89 | .89 |
| 2002 | .84 | .84 |
| 2003 | 1.20 | 1.20 |
| 2004 | 1.32 | 1.32 |
| 2005 | 1.42 | 1.42 |
| 2006 | 1.75 | 1.75 |
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