|
| year | production | consumption |
| 1984 | | |
| 1985 | | |
| 1986 | 725.50 | 739.45 |
| 1987 | 724.07 | 751.64 |
| 1988 | 771.30 | 757.69 |
| 1989 | 760.03 | 785.60 |
| 1990 | 764.12 | 635.99 |
| 1991 | 735.69 | 675.52 |
| 1992 | 857.33 | 704.47 |
| 1993 | 953.79 | 735.90 |
| 1994 | 980.41 | 757.34 |
| 1995 | 942.62 | 791.37 |
| 1996 | 1,060.35 | 865.20 |
| 1997 | 1,122.90 | 870.07 |
| 1998 | 1,141.89 | 854.44 |
| 1999 | 1,086.34 | 833.66 |
| 2000 | 1,271.42 | 1,133.14 |
| 2001 | 1,102.22 | 1,030.34 |
| 2002 | 1,035.19 | 774.58 |
| 2003 | 991.21 | 799.44 |
| 2004 | 1,054.90 | 765.51 |
| 2005 | 1,167.41 | 829.41 |
| 2006 | 1,090.46 | 865.91 |
| 2007 | 1,064.50 | 923.44 |
| 2008 | 1,049.40 | 933.60 |
| 2009 | 1,088.71 | 903.56 |
| 2010 | 1,071.91 | 1,013.32 |
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