|
| year | production | consumption |
| 1980 | | |
| 1981 | | |
| 1982 | | |
| 1983 | | |
| 1984 | | |
| 1985 | | |
| 1986 | | |
| 1987 | | |
| 1988 | | |
| 1989 | | |
| 1990 | | |
| 1991 | | |
| 1992 | 6,124.44 | 6,380.18 |
| 1993 | 5,644.94 | 6,357.03 |
| 1994 | 5,350.62 | 5,760.68 |
| 1995 | 5,383.69 | 5,809.18 |
| 1996 | 5,254.72 | 5,635.02 |
| 1997 | 5,640.53 | 6,196.09 |
| 1998 | 5,392.51 | 5,938.15 |
| 1999 | 5,028.75 | 5,497.23 |
| 2000 | 4,937.25 | 5,507.15 |
| 2001 | 4,555.85 | 5,795.95 |
| 2002 | 5,166.53 | 6,232.47 |
| 2003 | 5,324.16 | 5,962.40 |
| 2004 | 5,301.02 | 5,993.27 |
| 2005 | 5,003.39 | 5,788.24 |
| 2006 | 4,984.65 | 5,827.92 |
| 2007 | 4,998.98 | 5,857.68 |
| 2008 | 4,983.55 | 5,772.81 |
| 2009 | 4,882.14 | 5,480.69 |
| 2010 | 4,883.24 | 5,461.95 |
| 2011 | 4,961.50 | 5,544.63 |
|
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