|
| year | production | consumption |
| 1984 | 2,375.68 | 2,256.14 |
| 1985 | 2,476.16 | 2,295.63 |
| 1986 | 2,652.79 | 2,475.52 |
| 1987 | 2,690.93 | 2,546.82 |
| 1988 | 2,749.97 | 2,595.36 |
| 1989 | 2,759.45 | 2,591.19 |
| 1990 | 2,880.56 | 2,719.13 |
| 1991 | 2,853.19 | 2,644.67 |
| 1992 | 2,897.78 | 2,747.78 |
| 1993 | 2,928.57 | 2,766.18 |
| 1994 | 2,987.41 | 2,820.74 |
| 1995 | 2,992.56 | 2,788.27 |
| 1996 | 2,996.27 | 2,831.39 |
| 1997 | 3,164.00 | 2,976.31 |
| 1998 | 3,257.93 | 3,105.83 |
| 1999 | 3,196.60 | 3,154.02 |
| 2000 | 3,184.88 | 3,041.23 |
| 2001 | 3,126.24 | 2,966.24 |
| 2002 | 3,234.84 | 3,064.88 |
| 2003 | 3,324.91 | 3,168.04 |
| 2004 | 3,451.31 | 3,389.15 |
| 2005 | 3,328.99 | 3,309.02 |
| 2006 | 3,443.55 | 3,346.62 |
| 2007 | 3,338.72 | 3,228.28 |
| 2008 | | 2,941.05 |
| 2009 | 2,988.08 | 2,633.45 |
| 2010 | 3,087.64 | 2,670.50 |
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