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Loading...
| year | production | consumption |
| 1980 | 187.58 | 169.52 |
| 1981 | 198.08 | 179.02 |
| 1982 | 205.03 | 184.44 |
| 1983 | 213.24 | 191.58 |
| 1984 | 232.70 | 208.82 |
| 1985 | 250.05 | 220.45 |
| 1986 | 261.01 | 239.89 |
| 1987 | 275.97 | 248.84 |
| 1988 | 283.19 | 257.25 |
| 1989 | 293.50 | 267.36 |
| 1990 | 304.97 | 276.61 |
| 1991 | 313.08 | 279.32 |
| 1992 | 313.59 | 280.23 |
| 1993 | 325.21 | 290.85 |
| 1994 | 339.15 | 299.17 |
| 1995 | 351.84 | 313.87 |
| 1996 | 362.28 | 321.49 |
| 1997 | 381.58 | 336.09 |
| 1998 | 377.32 | 337.92 |
| 1999 | 392.71 | 350.01 |
| 2000 | 415.48 | 365.67 |
| 2001 | 431.59 | 380.22 |
| 2002 | 455.63 | 403.34 |
| 2003 | 477.96 | 420.27 |
| 2004 | 507.97 | 439.79 |
| 2005 | 527.90 | 466.57 |
| 2006 | 548.17 | 487.75 |
| 2007 | 574.20 | 511.77 |
| 2008 | 584.04 | 518.92 |
| 2009 | 583.44 | 515.12 |
| 2010 | 626.22 | 549.29 |
| 2011 | 646.72 | 573.20 |
| 2012 | 672.23 | 593.11 |
| 2013 | 679.93 | 597.91 |
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