|
| year | production | consumption |
| 1980 | | |
| 1981 | | |
| 1982 | | |
| 1983 | | |
| 1984 | | |
| 1985 | | |
| 1986 | | |
| 1987 | | |
| 1988 | | |
| 1989 | | |
| 1990 | | |
| 1991 | | |
| 1992 | | |
| 1993 | 3,909.90 | 15,933.91 |
| 1994 | 4,005.80 | 13,710.55 |
| 1995 | 4,143.59 | 13,948.65 |
| 1996 | 4,220.75 | 13,561.74 |
| 1997 | 4,315.55 | 12,383.37 |
| 1998 | 4,355.23 | 11,529.07 |
| 1999 | 4,131.46 | 10,876.51 |
| 2000 | 4,021.23 | 9,896.55 |
| 2001 | 3,774.31 | 10,122.53 |
| 2002 | 3,752.27 | 9,693.73 |
| 2003 | 3,413.86 | 10,227.25 |
| 2004 | 3,254.02 | 9,845.85 |
| 2005 | 2,767.90 | 9,290.28 |
| 2006 | 2,426.19 | 9,555.94 |
| 2007 | 2,326.98 | 8,824.00 |
| 2008 | 2,670.90 | 8,992.66 |
| 2009 | 2,836.25 | 8,567.16 |
| 2010 | 2,621.30 | 8,415.05 |
| 2011 | 2,619.09 | 8,288.28 |
|
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