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Loading...
| year | production | consumption |
| 1980 | 348.00 | 141.00 |
| 1981 | 284.00 | 105.00 |
| 1982 | 271.00 | 131.00 |
| 1983 | 272.00 | 135.00 |
| 1984 | 328.00 | 135.00 |
| 1985 | 307.00 | 140.00 |
| 1986 | 404.00 | 149.00 |
| 1987 | 366.00 | 144.00 |
| 1988 | 376.00 | 150.00 |
| 1989 | 355.00 | 158.00 |
| 1990 | 320.00 | 151.00 |
| 1991 | 359.00 | 165.00 |
| 1992 | 373.00 | 167.00 |
| 1993 | 383.00 | 160.00 |
| 1994 | 392.00 | 162.00 |
| 1995 | 419.00 | 158.00 |
| 1996 | 435.00 | 159.00 |
| 1997 | 433.00 | 156.00 |
| 1998 | 434.00 | 164.00 |
| 1999 | 443.00 | 171.00 |
| 2000 | 448.00 | 178.00 |
| 2001 | 453.00 | 181.00 |
| 2002 | 400.00 | 183.00 |
| 2003 | 425.00 | 185.00 |
| 2004 | 412.00 | 187.00 |
| 2005 | 432.00 | 192.00 |
| 2006 | 402.00 | 199.00 |
| 2007 | 397.00 | 194.00 |
| 2008 | 421.00 | 195.00 |
| 2009 | 421.00 | 179.00 |
| 2010 | 436.00 | 187.00 |
| 2011 | 420.00 | 189.00 |
| 2012 | 415.00 | 184.00 |
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