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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 | .00 | .00 |
| 1989 | .00 | .00 |
| 1990 | .00 | .00 |
| 1991 | .01 | .01 |
| 1992 | .02 | .02 |
| 1993 | .03 | .03 |
| 1994 | .37 | .37 |
| 1995 | 2.82 | 2.82 |
| 1996 | 1.45 | 1.45 |
| 1997 | 2.69 | 2.69 |
| 1998 | 2.61 | 2.61 |
| 1999 | 2.35 | 2.35 |
| 2000 | 2.91 | 2.91 |
| 2001 | 3.06 | 3.06 |
| 2002 | 3.20 | 3.20 |
| 2003 | 3.40 | 3.40 |
| 2004 | 3.71 | 3.71 |
| 2005 | 4.39 | 4.39 |
| 2006 | 6.16 | 6.16 |
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