Show data table
| 1970 | 0.0219 Mt | 1989 | 0.0427 Mt | 2008 | 0.1066 Mt |
| 1971 | 0.0219 Mt | 1990 | 0.0393 Mt | 2009 | 0.1327 Mt |
| 1972 | 0.0218 Mt | 1991 | 0.0477 Mt | 2010 | 0.1559 Mt |
| 1973 | 0.0225 Mt | 1992 | 0.0405 Mt | 2011 | 0.1408 Mt |
| 1974 | 0.0243 Mt | 1993 | 0.0395 Mt | 2012 | 0.1454 Mt |
| 1975 | 0.0253 Mt | 1994 | 0.0394 Mt | 2013 | 0.1746 Mt |
| 1976 | 0.0262 Mt | 1995 | 0.0405 Mt | 2014 | 0.1545 Mt |
| 1977 | 0.0271 Mt | 1996 | 0.0419 Mt | 2015 | 0.1712 Mt |
| 1978 | 0.0276 Mt | 1997 | 0.0417 Mt | 2016 | 0.2004 Mt |
| 1979 | 0.0318 Mt | 1998 | 0.0529 Mt | 2017 | 0.2607 Mt |
| 1980 | 0.0312 Mt | 1999 | 0.0551 Mt | 2018 | 0.2073 Mt |
| 1981 | 0.0299 Mt | 2000 | 0.0901 Mt | 2019 | 0.226 Mt |
| 1982 | 0.0278 Mt | 2001 | 0.0971 Mt | 2020 | 0.2687 Mt |
| 1983 | 0.0304 Mt | 2002 | 0.1004 Mt | 2021 | 0.3972 Mt |
| 1984 | 0.0294 Mt | 2003 | 0.1304 Mt | 2022 | 0.4298 Mt |
| 1985 | 0.0293 Mt | 2004 | 0.1402 Mt | 2023 | 0.4383 Mt |
| 1986 | 0.017 Mt | 2005 | 0.1357 Mt | 2024 | 0.4463 Mt |
| 1987 | 0.0503 Mt | 2006 | 0.1617 Mt | | |
| 1988 | 0.0462 Mt | 2007 | 0.1071 Mt | | |
Show data table
| 1970 | 0.09 t | 1989 | 0.1 t | 2008 | 0.17 t |
| 1971 | 0.09 t | 1990 | 0.09 t | 2009 | 0.21 t |
| 1972 | 0.08 t | 1991 | 0.1 t | 2010 | 0.24 t |
| 1973 | 0.08 t | 1992 | 0.09 t | 2011 | 0.21 t |
| 1974 | 0.09 t | 1993 | 0.08 t | 2012 | 0.21 t |
| 1975 | 0.09 t | 1994 | 0.08 t | 2013 | 0.25 t |
| 1976 | 0.09 t | 1995 | 0.08 t | 2014 | 0.22 t |
| 1977 | 0.09 t | 1996 | 0.08 t | 2015 | 0.24 t |
| 1978 | 0.09 t | 1997 | 0.08 t | 2016 | 0.27 t |
| 1979 | 0.1 t | 1998 | 0.1 t | 2017 | 0.34 t |
| 1980 | 0.09 t | 1999 | 0.1 t | 2018 | 0.27 t |
| 1981 | 0.09 t | 2000 | 0.17 t | 2019 | 0.29 t |
| 1982 | 0.08 t | 2001 | 0.18 t | 2020 | 0.33 t |
| 1983 | 0.08 t | 2002 | 0.18 t | 2021 | 0.49 t |
| 1984 | 0.08 t | 2003 | 0.23 t | 2022 | 0.52 t |
| 1985 | 0.08 t | 2004 | 0.24 t | 2023 | 0.52 t |
| 1986 | 0.04 t | 2005 | 0.23 t | 2024 | 0.51 t |
| 1987 | 0.12 t | 2006 | 0.27 t | | |
| 1988 | 0.11 t | 2007 | 0.17 t | | |