表を表示
| 1970 | 0.5713 Mt | 1989 | 0.8915 Mt | 2008 | 0.7631 Mt |
| 1971 | 0.5713 Mt | 1990 | 0.6287 Mt | 2009 | 0.7756 Mt |
| 1972 | 0.5684 Mt | 1991 | 0.479 Mt | 2010 | 0.7885 Mt |
| 1973 | 0.5881 Mt | 1992 | 0.3777 Mt | 2011 | 0.7883 Mt |
| 1974 | 0.6346 Mt | 1993 | 0.3873 Mt | 2012 | 0.7783 Mt |
| 1975 | 0.6597 Mt | 1994 | 0.386 Mt | 2013 | 0.7827 Mt |
| 1976 | 0.6847 Mt | 1995 | 0.3966 Mt | 2014 | 0.7732 Mt |
| 1977 | 0.7099 Mt | 1996 | 0.4105 Mt | 2015 | 0.8225 Mt |
| 1978 | 0.7224 Mt | 1997 | 0.4081 Mt | 2016 | 0.8378 Mt |
| 1979 | 0.8337 Mt | 1998 | 0.418 Mt | 2017 | 0.8367 Mt |
| 1980 | 0.8194 Mt | 1999 | 0.4359 Mt | 2018 | 0.8562 Mt |
| 1981 | 0.9117 Mt | 2000 | 0.6253 Mt | 2019 | 0.8465 Mt |
| 1982 | 0.8378 Mt | 2001 | 0.6627 Mt | 2020 | 0.7896 Mt |
| 1983 | 0.8965 Mt | 2002 | 0.7384 Mt | 2021 | 0.8172 Mt |
| 1984 | 0.8943 Mt | 2003 | 0.7524 Mt | 2022 | 0.8329 Mt |
| 1985 | 0.8818 Mt | 2004 | 0.7421 Mt | 2023 | 0.8496 Mt |
| 1986 | 1.0147 Mt | 2005 | 0.7544 Mt | 2024 | 0.8652 Mt |
| 1987 | 1.0418 Mt | 2006 | 0.7794 Mt | | |
| 1988 | 0.9404 Mt | 2007 | 0.7896 Mt | | |
表を表示
| 1970 | 0.15 t | 1989 | 0.13 t | 2008 | 0.07 t |
| 1971 | 0.15 t | 1990 | 0.09 t | 2009 | 0.06 t |
| 1972 | 0.14 t | 1991 | 0.07 t | 2010 | 0.06 t |
| 1973 | 0.15 t | 1992 | 0.06 t | 2011 | 0.06 t |
| 1974 | 0.15 t | 1993 | 0.06 t | 2012 | 0.06 t |
| 1975 | 0.15 t | 1994 | 0.05 t | 2013 | 0.06 t |
| 1976 | 0.16 t | 1995 | 0.05 t | 2014 | 0.06 t |
| 1977 | 0.16 t | 1996 | 0.05 t | 2015 | 0.06 t |
| 1978 | 0.15 t | 1997 | 0.05 t | 2016 | 0.06 t |
| 1979 | 0.15 t | 1998 | 0.05 t | 2017 | 0.06 t |
| 1980 | 0.14 t | 1999 | 0.05 t | 2018 | 0.06 t |
| 1981 | 0.15 t | 2000 | 0.07 t | 2019 | 0.05 t |
| 1982 | 0.14 t | 2001 | 0.07 t | 2020 | 0.05 t |
| 1983 | 0.14 t | 2002 | 0.08 t | 2021 | 0.05 t |
| 1984 | 0.14 t | 2003 | 0.08 t | 2022 | 0.05 t |
| 1985 | 0.13 t | 2004 | 0.07 t | 2023 | 0.05 t |
| 1986 | 0.15 t | 2005 | 0.07 t | 2024 | 0.05 t |
| 1987 | 0.14 t | 2006 | 0.07 t | | |
| 1988 | 0.13 t | 2007 | 0.07 t | | |