|
| year | production | consumption |
| 1980 | | |
| 1981 | | |
| 1982 | | |
| 1983 | | |
| 1984 | | |
| 1985 | | |
| 1986 | | |
| 1987 | | |
| 1988 | | |
| 1989 | | |
| 1990 | | |
| 1991 | | |
| 1992 | 139,489.80 | 100,107.50 |
| 1993 | 123,318.90 | 91,505.07 |
| 1994 | 115,329.30 | 87,641.47 |
| 1995 | 93,138.70 | 72,361.23 |
| 1996 | 85,956.04 | 64,720.01 |
| 1997 | 80,079.62 | 54,227.11 |
| 1998 | 78,071.20 | 54,343.95 |
| 1999 | 65,911.60 | 50,989.62 |
| 2000 | 85,367.40 | 49,238.04 |
| 2001 | 87,167.48 | 52,736.78 |
| 2002 | 81,566.63 | 54,317.50 |
| 2003 | 93,819.92 | 59,202.94 |
| 2004 | 95,912.11 | 69,144.69 |
| 2005 | 96,118.24 | 71,368.05 |
| 2006 | 106,554.90 | 76,565.45 |
| 2007 | 107,836.90 | 81,095.95 |
| 2008 | 122,435.90 | 87,042.91 |
| 2009 | 111,172.50 | 80,357.40 |
| 2010 | 122,278.30 | 86,714.42 |
| 2011 | 128,606.70 | 92,076.07 |
|
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