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Loading...
| year | production | consumption |
| 1980 | 19.00 | 19.00 |
| 1981 | 17.00 | 17.00 |
| 1982 | 14.00 | 14.00 |
| 1983 | 13.00 | 12.00 |
| 1984 | 15.00 | 15.00 |
| 1985 | 27.00 | 19.00 |
| 1986 | 27.00 | 23.00 |
| 1987 | 29.00 | 28.00 |
| 1988 | 37.00 | 37.00 |
| 1989 | 50.00 | 50.00 |
| 1990 | 66.00 | 65.00 |
| 1991 | 78.00 | 79.00 |
| 1992 | 88.00 | 96.00 |
| 1993 | 121.00 | 116.00 |
| 1994 | 139.00 | 142.00 |
| 1995 | 166.00 | 164.00 |
| 1996 | 194.00 | 187.00 |
| 1997 | 215.00 | 197.00 |
| 1998 | 208.00 | 168.00 |
| 1999 | 206.00 | 176.00 |
| 2000 | 208.00 | 170.00 |
| 2001 | 210.00 | 172.00 |
| 2002 | 211.00 | 176.00 |
| 2003 | 200.00 | 166.00 |
| 2004 | 206.00 | 159.00 |
| 2005 | 202.00 | 163.00 |
| 2006 | 217.00 | 164.00 |
| 2007 | 214.00 | 171.00 |
| 2008 | 254.00 | 172.00 |
| 2009 | 298.00 | 180.00 |
| 2010 | 306.00 | 189.00 |
| 2011 | 337.00 | 191.00 |
| 2012 | 376.00 | 189.00 |
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