表を表示
| 1970 | 673.62 Mt | 1989 | 579.54 Mt | 2008 | 533.91 Mt |
| 1971 | 668.88 Mt | 1990 | 582.61 Mt | 2009 | 483.47 Mt |
| 1972 | 657.94 Mt | 1991 | 591.74 Mt | 2010 | 500.75 Mt |
| 1973 | 690.26 Mt | 1992 | 578.44 Mt | 2011 | 459.21 Mt |
| 1974 | 644.87 Mt | 1993 | 562.4 Mt | 2012 | 481.39 Mt |
| 1975 | 623.9 Mt | 1994 | 554.88 Mt | 2013 | 470.22 Mt |
| 1976 | 630.05 Mt | 1995 | 548.34 Mt | 2014 | 430.66 Mt |
| 1977 | 638.55 Mt | 1996 | 567.62 Mt | 2015 | 415.88 Mt |
| 1978 | 636.71 Mt | 1997 | 546.74 Mt | 2016 | 391.86 Mt |
| 1979 | 672.9 Mt | 1998 | 547.41 Mt | 2017 | 380.71 Mt |
| 1980 | 608.56 Mt | 1999 | 544.01 Mt | 2018 | 373.88 Mt |
| 1981 | 589.25 Mt | 2000 | 551.96 Mt | 2019 | 359.01 Mt |
| 1982 | 573.33 Mt | 2001 | 563.12 Mt | 2020 | 319.7 Mt |
| 1983 | 566.5 Mt | 2002 | 547.16 Mt | 2021 | 337.91 Mt |
| 1984 | 550.2 Mt | 2003 | 560.74 Mt | 2022 | 324.99 Mt |
| 1985 | 576.79 Mt | 2004 | 561.17 Mt | 2023 | 304.79 Mt |
| 1986 | 590.78 Mt | 2005 | 559.52 Mt | 2024 | 292.42 Mt |
| 1987 | 595.44 Mt | 2006 | 559.93 Mt | | |
| 1988 | 593.14 Mt | 2007 | 550.42 Mt | | |
表を表示
| 1970 | 12.1 t | 1989 | 10.15 t | 2008 | 8.64 t |
| 1971 | 11.97 t | 1990 | 10.18 t | 2009 | 7.76 t |
| 1972 | 11.73 t | 1991 | 10.3 t | 2010 | 7.98 t |
| 1973 | 12.28 t | 1992 | 10.05 t | 2011 | 7.26 t |
| 1974 | 11.47 t | 1993 | 9.74 t | 2012 | 7.56 t |
| 1975 | 11.1 t | 1994 | 9.59 t | 2013 | 7.33 t |
| 1976 | 11.21 t | 1995 | 9.45 t | 2014 | 6.66 t |
| 1977 | 11.36 t | 1996 | 9.76 t | 2015 | 6.39 t |
| 1978 | 11.33 t | 1997 | 9.38 t | 2016 | 5.97 t |
| 1979 | 11.96 t | 1998 | 9.36 t | 2017 | 5.77 t |
| 1980 | 10.81 t | 1999 | 9.27 t | 2018 | 5.64 t |
| 1981 | 10.46 t | 2000 | 9.37 t | 2019 | 5.39 t |
| 1982 | 10.18 t | 2001 | 9.53 t | 2020 | 4.79 t |
| 1983 | 10.06 t | 2002 | 9.22 t | 2021 | 5.04 t |
| 1984 | 9.75 t | 2003 | 9.4 t | 2022 | 4.81 t |
| 1985 | 10.2 t | 2004 | 9.35 t | 2023 | 4.45 t |
| 1986 | 10.42 t | 2005 | 9.26 t | 2024 | 4.22 t |
| 1987 | 10.48 t | 2006 | 9.2 t | | |
| 1988 | 10.42 t | 2007 | 8.98 t | | |