表を表示
| 1970 | 0.257 Mt | 1989 | 0.7439 Mt | 2008 | 1.013 Mt |
| 1971 | 0.257 Mt | 1990 | 1.1058 Mt | 2009 | 1.0493 Mt |
| 1972 | 0.2634 Mt | 1991 | 1.0905 Mt | 2010 | 0.8556 Mt |
| 1973 | 0.276 Mt | 1992 | 0.9132 Mt | 2011 | 0.8194 Mt |
| 1974 | 0.2887 Mt | 1993 | 0.8204 Mt | 2012 | 0.811 Mt |
| 1975 | 0.3266 Mt | 1994 | 1.4598 Mt | 2013 | 0.9627 Mt |
| 1976 | 0.3203 Mt | 1995 | 1.4178 Mt | 2014 | 0.9829 Mt |
| 1977 | 0.3203 Mt | 1996 | 1.1355 Mt | 2015 | 0.9809 Mt |
| 1978 | 0.6052 Mt | 1997 | 1.1566 Mt | 2016 | 1.0469 Mt |
| 1979 | 0.6063 Mt | 1998 | 1.1787 Mt | 2017 | 1.0618 Mt |
| 1980 | 0.6185 Mt | 1999 | 1.2654 Mt | 2018 | 1.0621 Mt |
| 1981 | 0.5822 Mt | 2000 | 1.0976 Mt | 2019 | 1.1361 Mt |
| 1982 | 0.5881 Mt | 2001 | 1.112 Mt | 2020 | 0.9606 Mt |
| 1983 | 0.4407 Mt | 2002 | 1.0825 Mt | 2021 | 0.9892 Mt |
| 1984 | 0.4998 Mt | 2003 | 1.0047 Mt | 2022 | 1.0765 Mt |
| 1985 | 0.5748 Mt | 2004 | 0.9945 Mt | 2023 | 1.0784 Mt |
| 1986 | 0.6343 Mt | 2005 | 0.9909 Mt | 2024 | 1.0941 Mt |
| 1987 | 0.6654 Mt | 2006 | 0.9989 Mt | | |
| 1988 | 0.7096 Mt | 2007 | 1.0324 Mt | | |
表を表示
| 1970 | 0.58 t | 1989 | 0.89 t | 2008 | 0.92 t |
| 1971 | 0.57 t | 1990 | 1.27 t | 2009 | 0.95 t |
| 1972 | 0.57 t | 1991 | 1.2 t | 2010 | 0.77 t |
| 1973 | 0.58 t | 1992 | 0.97 t | 2011 | 0.73 t |
| 1974 | 0.59 t | 1993 | 0.84 t | 2012 | 0.72 t |
| 1975 | 0.64 t | 1994 | 1.5 t | 2013 | 0.85 t |
| 1976 | 0.61 t | 1995 | 1.46 t | 2014 | 0.87 t |
| 1977 | 0.59 t | 1996 | 1.15 t | 2015 | 0.86 t |
| 1978 | 1.08 t | 1997 | 1.15 t | 2016 | 0.91 t |
| 1979 | 1.05 t | 1998 | 1.16 t | 2017 | 0.92 t |
| 1980 | 1.04 t | 1999 | 1.23 t | 2018 | 0.91 t |
| 1981 | 0.94 t | 2000 | 1.05 t | 2019 | 0.96 t |
| 1982 | 0.92 t | 2001 | 1.06 t | 2020 | 0.81 t |
| 1983 | 0.67 t | 2002 | 1.02 t | 2021 | 0.82 t |
| 1984 | 0.73 t | 2003 | 0.94 t | 2022 | 0.88 t |
| 1985 | 0.81 t | 2004 | 0.93 t | 2023 | 0.88 t |
| 1986 | 0.86 t | 2005 | 0.92 t | 2024 | 0.88 t |
| 1987 | 0.87 t | 2006 | 0.92 t | | |
| 1988 | 0.89 t | 2007 | 0.95 t | | |