Show data table
| 1970 | 0.2471 Mt | 1989 | 0.4047 Mt | 2008 | 1.5615 Mt |
| 1971 | 0.2458 Mt | 1990 | 0.3193 Mt | 2009 | 2.0073 Mt |
| 1972 | 0.2482 Mt | 1991 | 0.3992 Mt | 2010 | 1.9869 Mt |
| 1973 | 0.259 Mt | 1992 | 0.3638 Mt | 2011 | 2.1656 Mt |
| 1974 | 0.2735 Mt | 1993 | 0.3545 Mt | 2012 | 2.2712 Mt |
| 1975 | 0.2866 Mt | 1994 | 0.3542 Mt | 2013 | 2.7412 Mt |
| 1976 | 0.2908 Mt | 1995 | 0.3639 Mt | 2014 | 2.9109 Mt |
| 1977 | 0.2987 Mt | 1996 | 0.3964 Mt | 2015 | 3.5312 Mt |
| 1978 | 0.3028 Mt | 1997 | 0.3939 Mt | 2016 | 4.5795 Mt |
| 1979 | 0.3417 Mt | 1998 | 0.4092 Mt | 2017 | 5.1611 Mt |
| 1980 | 0.3327 Mt | 1999 | 0.4262 Mt | 2018 | 5.782 Mt |
| 1981 | 0.424 Mt | 2000 | 0.796 Mt | 2019 | 6.1138 Mt |
| 1982 | 0.3023 Mt | 2001 | 0.8333 Mt | 2020 | 6.8432 Mt |
| 1983 | 0.3254 Mt | 2002 | 0.8731 Mt | 2021 | 7.3008 Mt |
| 1984 | 0.3177 Mt | 2003 | 0.8969 Mt | 2022 | 7.4928 Mt |
| 1985 | 0.3429 Mt | 2004 | 0.9141 Mt | 2023 | 7.177 Mt |
| 1986 | 0.2759 Mt | 2005 | 0.9448 Mt | 2024 | 7.4121 Mt |
| 1987 | 0.4361 Mt | 2006 | 1.1347 Mt | | |
| 1988 | 0.2392 Mt | 2007 | 1.3521 Mt | | |
Show data table
| 1970 | 0.04 t | 1989 | 0.04 t | 2008 | 0.1 t |
| 1971 | 0.04 t | 1990 | 0.03 t | 2009 | 0.13 t |
| 1972 | 0.04 t | 1991 | 0.04 t | 2010 | 0.12 t |
| 1973 | 0.04 t | 1992 | 0.04 t | 2011 | 0.13 t |
| 1974 | 0.04 t | 1993 | 0.04 t | 2012 | 0.13 t |
| 1975 | 0.04 t | 1994 | 0.04 t | 2013 | 0.16 t |
| 1976 | 0.04 t | 1995 | 0.04 t | 2014 | 0.16 t |
| 1977 | 0.04 t | 1996 | 0.04 t | 2015 | 0.19 t |
| 1978 | 0.04 t | 1997 | 0.04 t | 2016 | 0.24 t |
| 1979 | 0.05 t | 1998 | 0.04 t | 2017 | 0.26 t |
| 1980 | 0.04 t | 1999 | 0.04 t | 2018 | 0.28 t |
| 1981 | 0.06 t | 2000 | 0.07 t | 2019 | 0.29 t |
| 1982 | 0.04 t | 2001 | 0.07 t | 2020 | 0.32 t |
| 1983 | 0.04 t | 2002 | 0.07 t | 2021 | 0.33 t |
| 1984 | 0.04 t | 2003 | 0.07 t | 2022 | 0.32 t |
| 1985 | 0.04 t | 2004 | 0.07 t | 2023 | 0.3 t |
| 1986 | 0.03 t | 2005 | 0.07 t | 2024 | 0.3 t |
| 1987 | 0.05 t | 2006 | 0.08 t | | |
| 1988 | 0.03 t | 2007 | 0.09 t | | |