表を表示
| 1970 | 0.5454 Mt | 1989 | 0.6899 Mt | 2008 | 1.5891 Mt |
| 1971 | 0.3725 Mt | 1990 | 0.7551 Mt | 2009 | 2.7107 Mt |
| 1972 | 0.4182 Mt | 1991 | 0.6986 Mt | 2010 | 2.525 Mt |
| 1973 | 0.3672 Mt | 1992 | 0.5331 Mt | 2011 | 2.3171 Mt |
| 1974 | 0.3401 Mt | 1993 | 0.411 Mt | 2012 | 2.2462 Mt |
| 1975 | 0.3946 Mt | 1994 | 0.7477 Mt | 2013 | 1.9314 Mt |
| 1976 | 0.3496 Mt | 1995 | 0.7374 Mt | 2014 | 1.7347 Mt |
| 1977 | 0.4604 Mt | 1996 | 1.1297 Mt | 2015 | 1.546 Mt |
| 1978 | 0.5008 Mt | 1997 | 0.8495 Mt | 2016 | 2.1279 Mt |
| 1979 | 0.5579 Mt | 1998 | 1.0465 Mt | 2017 | 1.6554 Mt |
| 1980 | 0.5149 Mt | 1999 | 1.3541 Mt | 2018 | 1.9363 Mt |
| 1981 | 0.4989 Mt | 2000 | 1.2511 Mt | 2019 | 2.1053 Mt |
| 1982 | 0.5638 Mt | 2001 | 1.1264 Mt | 2020 | 2.4218 Mt |
| 1983 | 0.4115 Mt | 2002 | 1.199 Mt | 2021 | 2.534 Mt |
| 1984 | 0.4568 Mt | 2003 | 1.4374 Mt | 2022 | 2.6044 Mt |
| 1985 | 0.4307 Mt | 2004 | 1.378 Mt | 2023 | 2.5313 Mt |
| 1986 | 0.6394 Mt | 2005 | 1.3112 Mt | 2024 | 2.6276 Mt |
| 1987 | 0.6936 Mt | 2006 | 1.2217 Mt | | |
| 1988 | 0.68 Mt | 2007 | 1.2179 Mt | | |
表を表示
| 1970 | 0.24 t | 1989 | 0.18 t | 2008 | 0.25 t |
| 1971 | 0.16 t | 1990 | 0.19 t | 2009 | 0.41 t |
| 1972 | 0.18 t | 1991 | 0.17 t | 2010 | 0.38 t |
| 1973 | 0.15 t | 1992 | 0.13 t | 2011 | 0.34 t |
| 1974 | 0.14 t | 1993 | 0.1 t | 2012 | 0.32 t |
| 1975 | 0.15 t | 1994 | 0.18 t | 2013 | 0.27 t |
| 1976 | 0.13 t | 1995 | 0.17 t | 2014 | 0.23 t |
| 1977 | 0.17 t | 1996 | 0.25 t | 2015 | 0.2 t |
| 1978 | 0.18 t | 1997 | 0.18 t | 2016 | 0.27 t |
| 1979 | 0.2 t | 1998 | 0.22 t | 2017 | 0.21 t |
| 1980 | 0.18 t | 1999 | 0.27 t | 2018 | 0.23 t |
| 1981 | 0.17 t | 2000 | 0.24 t | 2019 | 0.25 t |
| 1982 | 0.18 t | 2001 | 0.21 t | 2020 | 0.28 t |
| 1983 | 0.13 t | 2002 | 0.22 t | 2021 | 0.29 t |
| 1984 | 0.14 t | 2003 | 0.26 t | 2022 | 0.29 t |
| 1985 | 0.13 t | 2004 | 0.24 t | 2023 | 0.27 t |
| 1986 | 0.18 t | 2005 | 0.22 t | 2024 | 0.28 t |
| 1987 | 0.19 t | 2006 | 0.2 t | | |
| 1988 | 0.18 t | 2007 | 0.2 t | | |