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Loading...
| year | production | consumption |
| 1980 | 138.00 | 122.00 |
| 1981 | 140.00 | 124.00 |
| 1982 | 150.00 | 132.00 |
| 1983 | 160.00 | 145.00 |
| 1984 | 178.00 | 162.00 |
| 1985 | 191.00 | 171.00 |
| 1986 | 199.00 | 186.00 |
| 1987 | 200.00 | 190.00 |
| 1988 | 212.00 | 201.00 |
| 1989 | 218.00 | 209.00 |
| 1990 | 220.00 | 213.00 |
| 1991 | 231.00 | 222.00 |
| 1992 | 239.00 | 228.00 |
| 1993 | 249.00 | 239.00 |
| 1994 | 257.00 | 248.00 |
| 1995 | 272.00 | 262.00 |
| 1996 | 288.00 | 278.00 |
| 1997 | 304.00 | 291.00 |
| 1998 | 318.00 | 303.00 |
| 1999 | 330.00 | 311.00 |
| 2000 | 343.00 | 322.00 |
| 2001 | 323.00 | 304.00 |
| 2002 | 340.00 | 319.00 |
| 2003 | 359.00 | 337.00 |
| 2004 | 381.00 | 353.00 |
| 2005 | 396.00 | 368.00 |
| 2006 | 412.00 | 383.00 |
| 2007 | 437.00 | 404.00 |
| 2008 | 455.00 | 420.00 |
| 2009 | 459.00 | 419.00 |
| 2010 | 507.00 | 456.00 |
| 2011 | 531.00 | 479.00 |
| 2012 | 538.00 | 484.00 |
| 2013 | 534.00 | 480.00 |
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