|
| year | production | consumption |
| 1984 | | |
| 1985 | | |
| 1986 | | 365.00 |
| 1987 | 400.33 | 393.61 |
| 1988 | 437.12 | 446.56 |
| 1989 | 429.77 | 463.60 |
| 1990 | 492.80 | 454.70 |
| 1991 | 546.40 | 503.30 |
| 1992 | 635.35 | 569.93 |
| 1993 | 738.49 | 682.40 |
| 1994 | 663.83 | 676.96 |
| 1995 | 705.97 | 678.55 |
| 1996 | 752.96 | 707.99 |
| 1997 | 813.86 | 774.10 |
| 1998 | 815.26 | 772.96 |
| 1999 | 874.34 | 787.82 |
| 2000 | 997.92 | 891.00 |
| 2001 | 965.81 | 861.70 |
| 2002 | 1,009.77 | 876.30 |
| 2003 | 1,119.62 | 944.59 |
| 2004 | 1,219.40 | 1,090.93 |
| 2005 | 1,269.69 | 1,134.02 |
| 2006 | 1,304.02 | 1,221.78 |
| 2007 | 1,378.71 | 1,285.53 |
| 2008 | 1,483.33 | 1,436.69 |
| 2009 | 1,710.84 | 1,442.55 |
| 2010 | 1,720.14 | 1,615.86 |
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