|
| year | production | consumption |
| 1980 | 380.00 | 594.00 |
| 1981 | 394.00 | 584.00 |
| 1982 | 370.00 | 616.00 |
| 1983 | 416.00 | 594.00 |
| 1984 | 492.00 | 635.00 |
| 1985 | 575.00 | 639.00 |
| 1986 | 520.00 | 644.00 |
| 1987 | 547.00 | 661.00 |
| 1988 | 538.00 | 694.00 |
| 1989 | 490.00 | 723.00 |
| 1990 | 575.00 | 738.00 |
| 1991 | 545.00 | 721.00 |
| 1992 | 534.61 | 730.00 |
| 1993 | 503.00 | 761.00 |
| 1994 | 536.38 | 788.00 |
| 1995 | 561.79 | 811.00 |
| 1996 | 569.63 | 831.00 |
| 1997 | 587.69 | 848.00 |
| 1998 | 543.97 | 852.00 |
| 1999 | 538.98 | 875.00 |
| 2000 | 721.57 | 872.43 |
| 2001 | 657.00 | 871.07 |
| 2002 | 625.97 | 882.42 |
| 2003 | 512.16 | 888.03 |
| 2004 | 435.96 | 912.88 |
| 2005 | 445.57 | 954.85 |
| 2006 | 429.25 | 962.03 |
| 2007 | 465.12 | 976.44 |
| 2008 | 476.82 | 963.63 |
| 2009 | 475.42 | 974.99 |
| 2010 | 484.17 | 988.83 |
| 2011 | 409.67 | 1,023.12 |
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