Show data table
| 1970 | 0.1537 Mt | 1989 | 0.1454 Mt | 2008 | 0.4847 Mt |
| 1971 | 0.1539 Mt | 1990 | 0.2354 Mt | 2009 | 0.4976 Mt |
| 1972 | 0.1535 Mt | 1991 | 0.2871 Mt | 2010 | 0.5246 Mt |
| 1973 | 0.1586 Mt | 1992 | 0.2468 Mt | 2011 | 0.6836 Mt |
| 1974 | 0.1708 Mt | 1993 | 0.1278 Mt | 2012 | 1.2091 Mt |
| 1975 | 0.1772 Mt | 1994 | 0.1432 Mt | 2013 | 1.3153 Mt |
| 1976 | 0.1843 Mt | 1995 | 0.1477 Mt | 2014 | 1.4041 Mt |
| 1977 | 0.194 Mt | 1996 | 0.1537 Mt | 2015 | 1.6134 Mt |
| 1978 | 0.1971 Mt | 1997 | 0.1587 Mt | 2016 | 1.6907 Mt |
| 1979 | 0.2249 Mt | 1998 | 0.1618 Mt | 2017 | 2.2104 Mt |
| 1980 | 0.2194 Mt | 1999 | 0.1674 Mt | 2018 | 2.4139 Mt |
| 1981 | 0.199 Mt | 2000 | 0.2404 Mt | 2019 | 2.3645 Mt |
| 1982 | 0.186 Mt | 2001 | 0.2432 Mt | 2020 | 2.4133 Mt |
| 1983 | 0.1996 Mt | 2002 | 0.2635 Mt | 2021 | 2.7311 Mt |
| 1984 | 0.0977 Mt | 2003 | 0.3973 Mt | 2022 | 2.865 Mt |
| 1985 | 0.1167 Mt | 2004 | 0.4555 Mt | 2023 | 2.9088 Mt |
| 1986 | 0.2 Mt | 2005 | 0.4809 Mt | 2024 | 2.8928 Mt |
| 1987 | 0.2503 Mt | 2006 | 0.4975 Mt | | |
| 1988 | 0.1432 Mt | 2007 | 0.568 Mt | | |
Show data table
| 1970 | 0.04 t | 1989 | 0.02 t | 2008 | 0.04 t |
| 1971 | 0.04 t | 1990 | 0.04 t | 2009 | 0.04 t |
| 1972 | 0.04 t | 1991 | 0.05 t | 2010 | 0.04 t |
| 1973 | 0.04 t | 1992 | 0.04 t | 2011 | 0.05 t |
| 1974 | 0.04 t | 1993 | 0.02 t | 2012 | 0.09 t |
| 1975 | 0.04 t | 1994 | 0.02 t | 2013 | 0.1 t |
| 1976 | 0.04 t | 1995 | 0.02 t | 2014 | 0.1 t |
| 1977 | 0.04 t | 1996 | 0.02 t | 2015 | 0.11 t |
| 1978 | 0.04 t | 1997 | 0.02 t | 2016 | 0.11 t |
| 1979 | 0.05 t | 1998 | 0.02 t | 2017 | 0.14 t |
| 1980 | 0.05 t | 1999 | 0.02 t | 2018 | 0.15 t |
| 1981 | 0.04 t | 2000 | 0.03 t | 2019 | 0.14 t |
| 1982 | 0.04 t | 2001 | 0.03 t | 2020 | 0.14 t |
| 1983 | 0.04 t | 2002 | 0.03 t | 2021 | 0.15 t |
| 1984 | 0.02 t | 2003 | 0.04 t | 2022 | 0.16 t |
| 1985 | 0.02 t | 2004 | 0.05 t | 2023 | 0.15 t |
| 1986 | 0.04 t | 2005 | 0.05 t | 2024 | 0.14 t |
| 1987 | 0.05 t | 2006 | 0.05 t | | |
| 1988 | 0.03 t | 2007 | 0.05 t | | |