|
| year | production | consumption |
| 1980 | | 522.00 |
| 1981 | | 481.00 |
| 1982 | | 445.00 |
| 1983 | | 406.74 |
| 1984 | | 385.00 |
| 1985 | | 405.00 |
| 1986 | | 454.00 |
| 1987 | | 457.00 |
| 1988 | | 470.00 |
| 1989 | | 462.00 |
| 1990 | | 463.00 |
| 1991 | | 497.00 |
| 1992 | | 509.00 |
| 1993 | | 500.00 |
| 1994 | | 553.00 |
| 1995 | | 550.00 |
| 1996 | | 593.00 |
| 1997 | | 611.00 |
| 1998 | | 622.00 |
| 1999 | | 593.00 |
| 2000 | | 606.32 |
| 2001 | | 609.07 |
| 2002 | | 617.27 |
| 2003 | | 654.55 |
| 2004 | | 656.54 |
| 2005 | | 659.81 |
| 2006 | | 638.23 |
| 2007 | | 640.38 |
| 2008 | | 716.61 |
| 2009 | | 630.20 |
| 2010 | | 644.93 |
| 2011 | | 644.44 |
|
|