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Loading...
| year | production | consumption |
| 1980 | 152.00 | 184.00 |
| 1981 | 154.00 | 191.00 |
| 1982 | 136.00 | 172.00 |
| 1983 | 125.00 | 162.00 |
| 1984 | 133.00 | 173.00 |
| 1985 | 133.00 | 172.00 |
| 1986 | 131.00 | 176.00 |
| 1987 | 134.00 | 182.00 |
| 1988 | 165.00 | 183.00 |
| 1989 | 121.00 | 187.00 |
| 1990 | 86.00 | 186.00 |
| 1991 | 88.00 | .00 |
| 1992 | 94.00 | .00 |
| 1993 | 101.00 | .00 |
| 1994 | 104.00 | .00 |
| 1995 | 105.00 | .00 |
| 1996 | 105.00 | .00 |
| 1997 | 103.00 | .00 |
| 1998 | 106.00 | .00 |
| 1999 | 106.00 | .00 |
| 2000 | 106.00 | .00 |
| 2001 | 109.00 | .00 |
| 2002 | 112.00 | .00 |
| 2003 | 116.00 | .00 |
| 2004 | 119.00 | .00 |
| 2005 | 132.00 | .00 |
| 2006 | 136.00 | .00 |
| 2007 | 140.00 | .00 |
| 2008 | 144.00 | .00 |
| 2009 | 149.00 | .00 |
| 2010 | 153.00 | .00 |
| 2011 | 158.00 | .00 |
| 2012 | 146.00 | .00 |
| 2013 | 161.00 | 161.00 |
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