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Loading...
| year | production | consumption |
| 1980 | 3.00 | 3.00 |
| 1981 | 3.00 | .00 |
| 1982 | 4.00 | .00 |
| 1983 | 3.00 | .00 |
| 1984 | 117.00 | 103.00 |
| 1985 | 124.00 | 124.00 |
| 1986 | 106.00 | 118.00 |
| 1987 | 60.00 | 156.00 |
| 1988 | 62.00 | 180.00 |
| 1989 | 63.00 | 181.00 |
| 1990 | 63.00 | 203.00 |
| 1991 | 71.00 | 229.00 |
| 1992 | 77.00 | 255.00 |
| 1993 | 78.00 | 265.00 |
| 1994 | 63.00 | 248.00 |
| 1995 | 63.00 | 266.00 |
| 1996 | 70.00 | 268.00 |
| 1997 | 70.00 | 286.00 |
| 1998 | 72.00 | 242.00 |
| 1999 | 60.00 | 306.00 |
| 2000 | 59.00 | 289.00 |
| 2001 | 60.00 | 308.00 |
| 2002 | 63.00 | 304.00 |
| 2003 | 63.00 | 343.00 |
| 2004 | 62.00 | 375.00 |
| 2005 | 57.00 | 393.00 |
| 2006 | 55.00 | 415.00 |
| 2007 | 59.00 | 422.00 |
| 2008 | 58.00 | 391.00 |
| 2009 | 55.00 | 377.00 |
| 2010 | 59.00 | 370.00 |
| 2011 | 55.00 | 397.00 |
| 2012 | 49.00 | 402.00 |
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