|
| year | production | consumption |
| 1980 | | |
| 1981 | | |
| 1982 | | |
| 1983 | | |
| 1984 | | |
| 1985 | | |
| 1986 | | |
| 1987 | | |
| 1988 | | |
| 1989 | | |
| 1990 | | |
| 1991 | 388,368.50 | 407,944.50 |
| 1992 | 346,087.20 | 362,204.10 |
| 1993 | 315,234.60 | 334,978.10 |
| 1994 | 291,781.80 | 314,276.70 |
| 1995 | 277,356.90 | 300,723.70 |
| 1996 | 264,991.30 | 295,808.60 |
| 1997 | 251,737.00 | 281,005.60 |
| 1998 | 232,999.40 | 268,773.80 |
| 1999 | 226,118.20 | 257,561.70 |
| 2000 | 226,047.60 | 269,814.90 |
| 2001 | 227,112.50 | 278,151.80 |
| 2002 | 232,573.20 | 278,407.30 |
| 2003 | 229,102.20 | 277,307.40 |
| 2004 | 232,672.60 | 280,407.10 |
| 2005 | 226,993.50 | 270,789.40 |
| 2006 | 220,553.80 | 270,533.70 |
| 2007 | 225,526.30 | 281,443.30 |
| 2008 | 214,268.40 | 267,881.50 |
| 2009 | 202,409.70 | 247,866.80 |
| 2010 | 200,954.70 | 255,957.80 |
| 2011 | 207,852.90 | 256,661.10 |
|
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