|
| year | production | consumption |
| 1984 | 183.95 | 608.43 |
| 1985 | 160.65 | 608.49 |
| 1986 | 561.13 | 905.82 |
| 1987 | 404.60 | 952.91 |
| 1988 | 396.70 | 943.98 |
| 1989 | 465.23 | 1,065.50 |
| 1990 | 478.58 | 1,351.08 |
| 1991 | 527.75 | 1,395.22 |
| 1992 | 694.02 | 1,563.77 |
| 1993 | 712.64 | 1,689.15 |
| 1994 | 868.69 | 1,743.10 |
| 1995 | 970.43 | 1,854.79 |
| 1996 | 967.09 | 2,018.09 |
| 1997 | 995.56 | 2,074.85 |
| 1998 | 1,042.19 | 2,047.72 |
| 1999 | 1,088.24 | 1,864.72 |
| 2000 | 1,135.71 | 2,192.27 |
| 2001 | 1,286.83 | 2,281.02 |
| 2002 | 1,512.74 | 2,489.50 |
| 2003 | 1,535.18 | 2,626.88 |
| 2004 | 1,644.68 | 2,715.52 |
| 2005 | 1,697.27 | 2,631.94 |
| 2006 | 1,616.78 | 2,591.28 |
| 2007 | 1,519.57 | 3,079.88 |
| 2008 | 1,530.08 | 2,911.64 |
| 2009 | 1,682.74 | 2,772.29 |
| 2010 | 1,682.60 | 3,220.59 |
|
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