Show data table
| 1970 | 2.3446 Mt | 1989 | 3.1715 Mt | 2008 | 8.6514 Mt |
| 1971 | 2.3843 Mt | 1990 | 3.1311 Mt | 2009 | 9.9181 Mt |
| 1972 | 2.4963 Mt | 1991 | 2.903 Mt | 2010 | 11.13 Mt |
| 1973 | 2.5508 Mt | 1992 | 3.4273 Mt | 2011 | 11.99 Mt |
| 1974 | 2.7186 Mt | 1993 | 3.5358 Mt | 2012 | 14.48 Mt |
| 1975 | 2.8941 Mt | 1994 | 3.7637 Mt | 2013 | 15.4 Mt |
| 1976 | 2.9599 Mt | 1995 | 4.0443 Mt | 2014 | 14.84 Mt |
| 1977 | 3.0552 Mt | 1996 | 4.3906 Mt | 2015 | 15.61 Mt |
| 1978 | 2.9713 Mt | 1997 | 4.6174 Mt | 2016 | 16.04 Mt |
| 1979 | 2.635 Mt | 1998 | 6.2701 Mt | 2017 | 17.37 Mt |
| 1980 | 2.6631 Mt | 1999 | 6.8427 Mt | 2018 | 19.06 Mt |
| 1981 | 3.1744 Mt | 2000 | 6.0172 Mt | 2019 | 20.28 Mt |
| 1982 | 2.7334 Mt | 2001 | 6.5036 Mt | 2020 | 22.95 Mt |
| 1983 | 1.7269 Mt | 2002 | 7.6803 Mt | 2021 | 24.49 Mt |
| 1984 | 2.0009 Mt | 2003 | 7.2083 Mt | 2022 | 23.79 Mt |
| 1985 | 2.3412 Mt | 2004 | 6.7168 Mt | 2023 | 23.22 Mt |
| 1986 | 2.5388 Mt | 2005 | 7.1058 Mt | 2024 | 24.17 Mt |
| 1987 | 2.7069 Mt | 2006 | 8.6407 Mt | | |
| 1988 | 2.8426 Mt | 2007 | 9.1225 Mt | | |
Show data table
| 1970 | 0.26 t | 1989 | 0.21 t | 2008 | 0.36 t |
| 1971 | 0.26 t | 1990 | 0.2 t | 2009 | 0.4 t |
| 1972 | 0.26 t | 1991 | 0.18 t | 2010 | 0.44 t |
| 1973 | 0.26 t | 1992 | 0.21 t | 2011 | 0.46 t |
| 1974 | 0.27 t | 1993 | 0.21 t | 2012 | 0.54 t |
| 1975 | 0.28 t | 1994 | 0.22 t | 2013 | 0.56 t |
| 1976 | 0.28 t | 1995 | 0.23 t | 2014 | 0.53 t |
| 1977 | 0.28 t | 1996 | 0.25 t | 2015 | 0.54 t |
| 1978 | 0.26 t | 1997 | 0.25 t | 2016 | 0.55 t |
| 1979 | 0.23 t | 1998 | 0.34 t | 2017 | 0.58 t |
| 1980 | 0.22 t | 1999 | 0.36 t | 2018 | 0.62 t |
| 1981 | 0.26 t | 2000 | 0.31 t | 2019 | 0.65 t |
| 1982 | 0.22 t | 2001 | 0.32 t | 2020 | 0.72 t |
| 1983 | 0.13 t | 2002 | 0.37 t | 2021 | 0.75 t |
| 1984 | 0.15 t | 2003 | 0.34 t | 2022 | 0.72 t |
| 1985 | 0.17 t | 2004 | 0.31 t | 2023 | 0.69 t |
| 1986 | 0.18 t | 2005 | 0.32 t | 2024 | 0.7 t |
| 1987 | 0.19 t | 2006 | 0.38 t | | |
| 1988 | 0.19 t | 2007 | 0.39 t | | |