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year | production | consumption |
1980 | .13 | .13 |
1981 | .11 | .11 |
1982 | .00 | .00 |
1983 | .00 | .00 |
1984 | .02 | .02 |
1985 | .00 | .00 |
1986 | .04 | .04 |
1987 | .05 | .05 |
1988 | .06 | .06 |
1989 | .06 | .06 |
1990 | .08 | .08 |
1991 | .11 | .11 |
1992 | .11 | .11 |
1993 | .13 | .13 |
1994 | .12 | .12 |
1995 | .29 | .29 |
1996 | .25 | .25 |
1997 | .36 | .36 |
1998 | .33 | .33 |
1999 | .29 | .29 |
2000 | .31 | .31 |
2001 | .32 | .32 |
2002 | .31 | .31 |
2003 | .25 | .25 |
2004 | .24 | .24 |
2005 | .26 | .26 |
2006 | .36 | .36 |
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