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year | production | consumption |
1980 | .66 | .42 |
1981 | .63 | .44 |
1982 | .71 | .46 |
1983 | .93 | .52 |
1984 | 1.31 | .61 |
1985 | 1.43 | .70 |
1986 | 1.66 | .75 |
1987 | 1.68 | .75 |
1988 | 1.81 | .80 |
1989 | 1.92 | .86 |
1990 | 2.03 | .98 |
1991 | 2.19 | 1.09 |
1992 | 2.26 | 1.14 |
1993 | 2.34 | 1.29 |
1994 | 2.41 | 1.43 |
1995 | 2.59 | 1.47 |
1996 | 2.84 | 1.67 |
1997 | 3.01 | 1.67 |
1998 | 3.14 | 1.69 |
1999 | 3.16 | 1.72 |
2000 | 3.31 | 1.98 |
2001 | 3.34 | 2.10 |
2002 | 3.43 | 2.24 |
2003 | 3.66 | 2.16 |
2004 | 3.71 | 2.19 |
2005 | 3.74 | 2.30 |
2006 | 3.67 | 2.36 |
2007 | 3.79 | 2.59 |
2008 | 3.88 | 2.74 |
2009 | 3.81 | 2.84 |
2010 | 3.84 | 3.03 |
2011 | 3.74 | 3.22 |
2012 | 3.78 | 3.23 |
2013 | 3.80 | 3.25 |
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