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Loading...
| year | production | consumption |
| 1980 | 40.00 | 39.00 |
| 1981 | 47.00 | 47.00 |
| 1982 | 81.00 | 80.00 |
| 1983 | 86.00 | 84.00 |
| 1984 | 106.00 | 105.00 |
| 1985 | 133.00 | 134.00 |
| 1986 | 159.00 | 157.00 |
| 1987 | 152.00 | 151.00 |
| 1988 | 166.00 | 165.00 |
| 1989 | 170.00 | 168.00 |
| 1990 | 169.00 | 169.00 |
| 1991 | 186.00 | 182.00 |
| 1992 | 197.00 | 195.00 |
| 1993 | 175.00 | 175.00 |
| 1994 | 176.00 | 175.00 |
| 1995 | 166.00 | 166.00 |
| 1996 | 188.00 | 186.00 |
| 1997 | 200.00 | 199.00 |
| 1998 | 175.00 | 175.00 |
| 1999 | 202.00 | 200.00 |
| 2000 | 214.00 | 212.00 |
| 2001 | 226.00 | 228.00 |
| 2002 | 215.00 | 212.00 |
| 2003 | 164.00 | 165.00 |
| 2004 | 150.00 | 147.00 |
| 2005 | 146.00 | 146.00 |
| 2006 | 140.00 | 136.00 |
| 2007 | 155.00 | 153.00 |
| 2008 | 151.00 | 147.00 |
| 2009 | 159.00 | 150.00 |
| 2010 | 171.00 | 164.00 |
| 2011 | 154.00 | 153.00 |
| 2012 | 164.00 | 159.00 |
| 2013 | 169.00 | 163.00 |
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