表を表示
| 1970 | 0.7116 Mt | 1989 | 1.227 Mt | 2008 | 0.8069 Mt |
| 1971 | 0.7116 Mt | 1990 | 0.9747 Mt | 2009 | 0.7283 Mt |
| 1972 | 0.708 Mt | 1991 | 1.2297 Mt | 2010 | 0.8116 Mt |
| 1973 | 0.7327 Mt | 1992 | 1.0504 Mt | 2011 | 0.6271 Mt |
| 1974 | 0.7913 Mt | 1993 | 1.0325 Mt | 2012 | 0.796 Mt |
| 1975 | 0.8221 Mt | 1994 | 1.0572 Mt | 2013 | 0.8754 Mt |
| 1976 | 0.8525 Mt | 1995 | 1.0771 Mt | 2014 | 0.8835 Mt |
| 1977 | 0.8829 Mt | 1996 | 1.1156 Mt | 2015 | 0.8163 Mt |
| 1978 | 0.8971 Mt | 1997 | 1.1176 Mt | 2016 | 0.7455 Mt |
| 1979 | 1.0364 Mt | 1998 | 1.1439 Mt | 2017 | 0.6766 Mt |
| 1980 | 1.0171 Mt | 1999 | 1.1936 Mt | 2018 | 0.7356 Mt |
| 1981 | 0.7786 Mt | 2000 | 0.7336 Mt | 2019 | 0.8336 Mt |
| 1982 | 0.7221 Mt | 2001 | 0.755 Mt | 2020 | 0.7459 Mt |
| 1983 | 0.5936 Mt | 2002 | 0.7829 Mt | 2021 | 0.8197 Mt |
| 1984 | 0.4776 Mt | 2003 | 0.8269 Mt | 2022 | 0.8668 Mt |
| 1985 | 0.4759 Mt | 2004 | 0.7915 Mt | 2023 | 0.88 Mt |
| 1986 | 0.4449 Mt | 2005 | 0.7541 Mt | 2024 | 0.8947 Mt |
| 1987 | 0.6428 Mt | 2006 | 0.7235 Mt | | |
| 1988 | 0.577 Mt | 2007 | 0.7502 Mt | | |
表を表示
| 1970 | 4.9 t | 1989 | 2.34 t | 2008 | 0.9 t |
| 1971 | 4.59 t | 1990 | 1.68 t | 2009 | 0.8 t |
| 1972 | 4.26 t | 1991 | 1.95 t | 2010 | 0.87 t |
| 1973 | 4.11 t | 1992 | 1.68 t | 2011 | 0.66 t |
| 1974 | 4.11 t | 1993 | 1.68 t | 2012 | 0.82 t |
| 1975 | 3.92 t | 1994 | 1.69 t | 2013 | 0.89 t |
| 1976 | 3.69 t | 1995 | 1.7 t | 2014 | 0.88 t |
| 1977 | 3.47 t | 1996 | 1.72 t | 2015 | 0.8 t |
| 1978 | 3.2 t | 1997 | 1.66 t | 2016 | 0.72 t |
| 1979 | 3.4 t | 1998 | 1.64 t | 2017 | 0.64 t |
| 1980 | 3.12 t | 1999 | 1.65 t | 2018 | 0.69 t |
| 1981 | 2.27 t | 2000 | 0.98 t | 2019 | 0.77 t |
| 1982 | 2.02 t | 2001 | 0.98 t | 2020 | 0.67 t |
| 1983 | 1.61 t | 2002 | 0.98 t | 2021 | 0.73 t |
| 1984 | 1.24 t | 2003 | 1.02 t | 2022 | 0.76 t |
| 1985 | 1.18 t | 2004 | 0.96 t | 2023 | 0.76 t |
| 1986 | 1.04 t | 2005 | 0.9 t | 2024 | 0.77 t |
| 1987 | 1.41 t | 2006 | 0.85 t | | |
| 1988 | 1.19 t | 2007 | 0.86 t | | |