Show data table
| 1970 | 3.7483 Mt | 1989 | 6.5662 Mt | 2008 | 10.57 Mt |
| 1971 | 3.7481 Mt | 1990 | 6.4662 Mt | 2009 | 12.47 Mt |
| 1972 | 3.9135 Mt | 1991 | 6.2172 Mt | 2010 | 13.48 Mt |
| 1973 | 4.0538 Mt | 1992 | 6.2967 Mt | 2011 | 13.88 Mt |
| 1974 | 4.0929 Mt | 1993 | 6.1914 Mt | 2012 | 12.89 Mt |
| 1975 | 4.0294 Mt | 1994 | 6.2863 Mt | 2013 | 13.89 Mt |
| 1976 | 4.5864 Mt | 1995 | 6.7215 Mt | 2014 | 15.71 Mt |
| 1977 | 4.9052 Mt | 1996 | 7.4009 Mt | 2015 | 17 Mt |
| 1978 | 4.9074 Mt | 1997 | 7.1148 Mt | 2016 | 18.5 Mt |
| 1979 | 4.8465 Mt | 1998 | 7.783 Mt | 2017 | 19.25 Mt |
| 1980 | 5.1977 Mt | 1999 | 7.9883 Mt | 2018 | 19.14 Mt |
| 1981 | 5.1665 Mt | 2000 | 8.9072 Mt | 2019 | 19.48 Mt |
| 1982 | 4.8398 Mt | 2001 | 8.2528 Mt | 2020 | 19.16 Mt |
| 1983 | 4.5201 Mt | 2002 | 8.0095 Mt | 2021 | 21.52 Mt |
| 1984 | 5.2362 Mt | 2003 | 7.2312 Mt | 2022 | 21.97 Mt |
| 1985 | 5.383 Mt | 2004 | 8.0523 Mt | 2023 | 21.27 Mt |
| 1986 | 6.0123 Mt | 2005 | 9.026 Mt | 2024 | 21.64 Mt |
| 1987 | 6.2544 Mt | 2006 | 9.9988 Mt | | |
| 1988 | 6.2213 Mt | 2007 | 10 Mt | | |
Show data table
| 1970 | 0.33 t | 1989 | 0.3 t | 2008 | 0.27 t |
| 1971 | 0.32 t | 1990 | 0.28 t | 2009 | 0.31 t |
| 1972 | 0.32 t | 1991 | 0.26 t | 2010 | 0.32 t |
| 1973 | 0.32 t | 1992 | 0.26 t | 2011 | 0.32 t |
| 1974 | 0.31 t | 1993 | 0.25 t | 2012 | 0.29 t |
| 1975 | 0.3 t | 1994 | 0.24 t | 2013 | 0.31 t |
| 1976 | 0.33 t | 1995 | 0.25 t | 2014 | 0.34 t |
| 1977 | 0.34 t | 1996 | 0.27 t | 2015 | 0.36 t |
| 1978 | 0.33 t | 1997 | 0.25 t | 2016 | 0.38 t |
| 1979 | 0.31 t | 1998 | 0.27 t | 2017 | 0.39 t |
| 1980 | 0.32 t | 1999 | 0.27 t | 2018 | 0.38 t |
| 1981 | 0.31 t | 2000 | 0.29 t | 2019 | 0.38 t |
| 1982 | 0.28 t | 2001 | 0.26 t | 2020 | 0.37 t |
| 1983 | 0.25 t | 2002 | 0.25 t | 2021 | 0.4 t |
| 1984 | 0.28 t | 2003 | 0.21 t | 2022 | 0.41 t |
| 1985 | 0.28 t | 2004 | 0.23 t | 2023 | 0.38 t |
| 1986 | 0.3 t | 2005 | 0.25 t | 2024 | 0.38 t |
| 1987 | 0.3 t | 2006 | 0.27 t | | |
| 1988 | 0.29 t | 2007 | 0.26 t | | |