Show data table
| 1970 | 10.09 Mt | 1989 | 18.11 Mt | 2008 | 5.6485 Mt |
| 1971 | 10.11 Mt | 1990 | 20.78 Mt | 2009 | 4.502 Mt |
| 1972 | 10.82 Mt | 1991 | 21.6 Mt | 2010 | 4.2991 Mt |
| 1973 | 11.76 Mt | 1992 | 10.98 Mt | 2011 | 4.9041 Mt |
| 1974 | 12.67 Mt | 1993 | 5.1153 Mt | 2012 | 5.6696 Mt |
| 1975 | 13.83 Mt | 1994 | 2.8083 Mt | 2013 | 5.4929 Mt |
| 1976 | 14.22 Mt | 1995 | 3.5412 Mt | 2014 | 5.7607 Mt |
| 1977 | 14.76 Mt | 1996 | 2.5941 Mt | 2015 | 5.6172 Mt |
| 1978 | 15.36 Mt | 1997 | 3.3384 Mt | 2016 | 5.3749 Mt |
| 1979 | 15.94 Mt | 1998 | 3.4727 Mt | 2017 | 5.6892 Mt |
| 1980 | 17.01 Mt | 1999 | 3.1043 Mt | 2018 | 5.9516 Mt |
| 1981 | 17.42 Mt | 2000 | 3.5697 Mt | 2019 | 6.4247 Mt |
| 1982 | 17.96 Mt | 2001 | 3.6334 Mt | 2020 | 6.9145 Mt |
| 1983 | 18.01 Mt | 2002 | 3.1014 Mt | 2021 | 7.4634 Mt |
| 1984 | 18.15 Mt | 2003 | 3.4708 Mt | 2022 | 7.7742 Mt |
| 1985 | 18.23 Mt | 2004 | 3.7592 Mt | 2023 | 7.4987 Mt |
| 1986 | 18.42 Mt | 2005 | 4.4627 Mt | 2024 | 7.4936 Mt |
| 1987 | 18.62 Mt | 2006 | 4.4457 Mt | | |
| 1988 | 18.53 Mt | 2007 | 5.1543 Mt | | |
Show data table
| 1970 | 4.08 t | 1989 | 5.26 t | 2008 | 1.83 t |
| 1971 | 4 t | 1990 | 5.85 t | 2009 | 1.47 t |
| 1972 | 4.2 t | 1991 | 5.98 t | 2010 | 1.41 t |
| 1973 | 4.47 t | 1992 | 3.07 t | 2011 | 1.62 t |
| 1974 | 4.72 t | 1993 | 1.48 t | 2012 | 1.87 t |
| 1975 | 5.04 t | 1994 | 0.83 t | 2013 | 1.82 t |
| 1976 | 5.05 t | 1995 | 1.07 t | 2014 | 1.91 t |
| 1977 | 5.07 t | 1996 | 0.79 t | 2015 | 1.87 t |
| 1978 | 5.1 t | 1997 | 1.03 t | 2016 | 1.8 t |
| 1979 | 5.18 t | 1998 | 1.08 t | 2017 | 1.91 t |
| 1980 | 5.47 t | 1999 | 0.98 t | 2018 | 2 t |
| 1981 | 5.56 t | 2000 | 1.11 t | 2019 | 2.17 t |
| 1982 | 5.68 t | 2001 | 1.13 t | 2020 | 2.33 t |
| 1983 | 5.64 t | 2002 | 0.97 t | 2021 | 2.52 t |
| 1984 | 5.63 t | 2003 | 1.09 t | 2022 | 2.62 t |
| 1985 | 5.59 t | 2004 | 1.19 t | 2023 | 2.53 t |
| 1986 | 5.59 t | 2005 | 1.42 t | 2024 | 2.47 t |
| 1987 | 5.59 t | 2006 | 1.42 t | | |
| 1988 | 5.52 t | 2007 | 1.66 t | | |