|
| year | production | consumption |
| 1984 | 2,680.94 | 2,844.86 |
| 1985 | 2,687.50 | 2,868.02 |
| 1986 | 2,797.87 | 2,914.36 |
| 1987 | 2,730.51 | 2,976.47 |
| 1988 | 2,858.71 | 3,121.61 |
| 1989 | 2,898.56 | 3,156.78 |
| 1990 | 2,924.62 | 3,020.56 |
| 1991 | 2,961.69 | 2,920.77 |
| 1992 | 2,973.56 | 2,978.89 |
| 1993 | 3,131.71 | 3,041.21 |
| 1994 | 3,204.63 | 3,162.24 |
| 1995 | 3,155.44 | 3,206.63 |
| 1996 | 3,315.75 | 3,365.24 |
| 1997 | 3,391.89 | 3,435.45 |
| 1998 | 3,424.33 | 3,461.44 |
| 1999 | 3,399.41 | 3,572.00 |
| 2000 | 3,579.67 | 3,722.17 |
| 2001 | 3,694.59 | 3,846.80 |
| 2002 | 3,592.20 | 3,775.91 |
| 2003 | 3,707.23 | 3,927.05 |
| 2004 | 3,814.31 | 4,058.26 |
| 2005 | 3,954.38 | 4,118.01 |
| 2006 | 4,040.39 | 4,169.13 |
| 2007 | 4,132.96 | 4,195.91 |
| 2008 | 4,293.82 | 3,945.42 |
| 2009 | 4,048.04 | 3,631.08 |
| 2010 | 4,223.30 | 3,800.32 |
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