年份 | 1959 | 1963 | 1966 | 1969 | 1974 | 1976 | 1992 | 1983 | 1997 | 1998 | 1999 | 2000 |
产量(万T) | 164 | 439 | 1300 | 1580 | 4100 | 5000 | 5565 | 5235 | 5601 | 5570 | 5450 | 5300 |
年份 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | 2015 | 2016 | 2017 | 2018 |
产量(万T) | 5150 | 5013 | 4840 | 4640 | 4495 | 4338 | 4162 | 4020 | 3800 | 3656 | 3400 | 3204 |