Show data table
| 1970 | 4.8125 Mt | 1989 | 4.7104 Mt | 2008 | 8.3603 Mt |
| 1971 | 4.8352 Mt | 1990 | 4.4326 Mt | 2009 | 7.7887 Mt |
| 1972 | 4.7253 Mt | 1991 | 4.2913 Mt | 2010 | 8.6324 Mt |
| 1973 | 3.7662 Mt | 1992 | 4.5496 Mt | 2011 | 9.1725 Mt |
| 1974 | 4.3418 Mt | 1993 | 5.0874 Mt | 2012 | 12.56 Mt |
| 1975 | 4.2578 Mt | 1994 | 6.1001 Mt | 2013 | 14.22 Mt |
| 1976 | 4.5509 Mt | 1995 | 7.4001 Mt | 2014 | 17.74 Mt |
| 1977 | 4.873 Mt | 1996 | 7.7815 Mt | 2015 | 19.74 Mt |
| 1978 | 5.0494 Mt | 1997 | 7.7466 Mt | 2016 | 22.98 Mt |
| 1979 | 5.2553 Mt | 1998 | 8.4254 Mt | 2017 | 33.75 Mt |
| 1980 | 5.5535 Mt | 1999 | 9.2448 Mt | 2018 | 33.52 Mt |
| 1981 | 5.5045 Mt | 2000 | 10.04 Mt | 2019 | 34.39 Mt |
| 1982 | 5.6969 Mt | 2001 | 8.7748 Mt | 2020 | 34.72 Mt |
| 1983 | 5.5244 Mt | 2002 | 8.8446 Mt | 2021 | 31.84 Mt |
| 1984 | 6.0369 Mt | 2003 | 10.96 Mt | 2022 | 31.03 Mt |
| 1985 | 6.3629 Mt | 2004 | 10.63 Mt | 2023 | 31.24 Mt |
| 1986 | 6.6657 Mt | 2005 | 11.24 Mt | 2024 | 31.36 Mt |
| 1987 | 5.0601 Mt | 2006 | 10.46 Mt | | |
| 1988 | 4.7668 Mt | 2007 | 10.92 Mt | | |
Show data table
| 1970 | 0.18 t | 1989 | 0.12 t | 2008 | 0.17 t |
| 1971 | 0.17 t | 1990 | 0.11 t | 2009 | 0.16 t |
| 1972 | 0.17 t | 1991 | 0.11 t | 2010 | 0.18 t |
| 1973 | 0.13 t | 1992 | 0.11 t | 2011 | 0.19 t |
| 1974 | 0.15 t | 1993 | 0.12 t | 2012 | 0.25 t |
| 1975 | 0.14 t | 1994 | 0.15 t | 2013 | 0.28 t |
| 1976 | 0.15 t | 1995 | 0.17 t | 2014 | 0.35 t |
| 1977 | 0.16 t | 1996 | 0.18 t | 2015 | 0.39 t |
| 1978 | 0.16 t | 1997 | 0.18 t | 2016 | 0.45 t |
| 1979 | 0.16 t | 1998 | 0.19 t | 2017 | 0.65 t |
| 1980 | 0.17 t | 1999 | 0.21 t | 2018 | 0.64 t |
| 1981 | 0.16 t | 2000 | 0.22 t | 2019 | 0.65 t |
| 1982 | 0.17 t | 2001 | 0.19 t | 2020 | 0.65 t |
| 1983 | 0.16 t | 2002 | 0.19 t | 2021 | 0.6 t |
| 1984 | 0.17 t | 2003 | 0.23 t | 2022 | 0.58 t |
| 1985 | 0.17 t | 2004 | 0.23 t | 2023 | 0.58 t |
| 1986 | 0.18 t | 2005 | 0.24 t | 2024 | 0.58 t |
| 1987 | 0.13 t | 2006 | 0.22 t | | |
| 1988 | 0.12 t | 2007 | 0.23 t | | |