Show data table
| 1970 | 1.1807 Mt | 1989 | 4.7633 Mt | 2008 | 7.0689 Mt |
| 1971 | 0.9288 Mt | 1990 | 4.7565 Mt | 2009 | 7.7138 Mt |
| 1972 | 0.9688 Mt | 1991 | 4.5319 Mt | 2010 | 7.828 Mt |
| 1973 | 1.0115 Mt | 1992 | 4.3565 Mt | 2011 | 7.4295 Mt |
| 1974 | 0.9862 Mt | 1993 | 4.7598 Mt | 2012 | 7.5111 Mt |
| 1975 | 1.2499 Mt | 1994 | 5.1473 Mt | 2013 | 8.1791 Mt |
| 1976 | 1.1637 Mt | 1995 | 5.1557 Mt | 2014 | 8.8705 Mt |
| 1977 | 1.6253 Mt | 1996 | 5.2861 Mt | 2015 | 9.1854 Mt |
| 1978 | 1.7605 Mt | 1997 | 5.3218 Mt | 2016 | 9.7014 Mt |
| 1979 | 1.9122 Mt | 1998 | 5.5393 Mt | 2017 | 9.8633 Mt |
| 1980 | 2.0381 Mt | 1999 | 5.3343 Mt | 2018 | 10.55 Mt |
| 1981 | 2.1765 Mt | 2000 | 5.7263 Mt | 2019 | 10.27 Mt |
| 1982 | 2.3074 Mt | 2001 | 5.7003 Mt | 2020 | 10.39 Mt |
| 1983 | 4.6581 Mt | 2002 | 5.6195 Mt | 2021 | 10.35 Mt |
| 1984 | 4.8687 Mt | 2003 | 5.736 Mt | 2022 | 10.43 Mt |
| 1985 | 4.7794 Mt | 2004 | 5.6371 Mt | 2023 | 10.33 Mt |
| 1986 | 5.7872 Mt | 2005 | 5.4713 Mt | 2024 | 10.29 Mt |
| 1987 | 5.2619 Mt | 2006 | 5.5767 Mt | | |
| 1988 | 3.3161 Mt | 2007 | 6.7369 Mt | | |
Show data table
| 1970 | 0.18 t | 1989 | 0.43 t | 2008 | 0.38 t |
| 1971 | 0.14 t | 1990 | 0.42 t | 2009 | 0.4 t |
| 1972 | 0.14 t | 1991 | 0.39 t | 2010 | 0.4 t |
| 1973 | 0.14 t | 1992 | 0.36 t | 2011 | 0.37 t |
| 1974 | 0.14 t | 1993 | 0.39 t | 2012 | 0.36 t |
| 1975 | 0.17 t | 1994 | 0.41 t | 2013 | 0.38 t |
| 1976 | 0.15 t | 1995 | 0.39 t | 2014 | 0.4 t |
| 1977 | 0.21 t | 1996 | 0.39 t | 2015 | 0.4 t |
| 1978 | 0.22 t | 1997 | 0.39 t | 2016 | 0.41 t |
| 1979 | 0.23 t | 1998 | 0.39 t | 2017 | 0.41 t |
| 1980 | 0.24 t | 1999 | 0.37 t | 2018 | 0.43 t |
| 1981 | 0.25 t | 2000 | 0.38 t | 2019 | 0.4 t |
| 1982 | 0.26 t | 2001 | 0.37 t | 2020 | 0.4 t |
| 1983 | 0.51 t | 2002 | 0.36 t | 2021 | 0.38 t |
| 1984 | 0.51 t | 2003 | 0.35 t | 2022 | 0.38 t |
| 1985 | 0.49 t | 2004 | 0.34 t | 2023 | 0.36 t |
| 1986 | 0.58 t | 2005 | 0.32 t | 2024 | 0.35 t |
| 1987 | 0.51 t | 2006 | 0.32 t | | |
| 1988 | 0.31 t | 2007 | 0.37 t | | |