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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 | .01 | .01 |
| 1990 | .03 | .03 |
| 1991 | .04 | .04 |
| 1992 | .08 | .08 |
| 1993 | .09 | .09 |
| 1994 | .18 | .18 |
| 1995 | .47 | .47 |
| 1996 | .84 | .84 |
| 1997 | .95 | .95 |
| 1998 | 1.03 | 1.03 |
| 1999 | 2.30 | 2.30 |
| 2000 | 2.89 | 2.89 |
| 2001 | 3.87 | 3.87 |
| 2002 | 4.31 | 4.31 |
| 2003 | 5.20 | 5.20 |
| 2004 | 6.08 | 6.08 |
| 2005 | 8.15 | 8.15 |
| 2006 | 9.45 | 9.45 |
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