表を表示
| 1970 | 469.21 Mt | 1989 | 390.08 Mt | 2008 | 382.57 Mt |
| 1971 | 481.32 Mt | 1990 | 384.98 Mt | 2009 | 369.94 Mt |
| 1972 | 498.87 Mt | 1991 | 410.04 Mt | 2010 | 377.28 Mt |
| 1973 | 535.51 Mt | 1992 | 396.63 Mt | 2011 | 363.69 Mt |
| 1974 | 516.77 Mt | 1993 | 376.97 Mt | 2012 | 365.02 Mt |
| 1975 | 476.25 Mt | 1994 | 372.67 Mt | 2013 | 360.16 Mt |
| 1976 | 521.75 Mt | 1995 | 381.75 Mt | 2014 | 326.95 Mt |
| 1977 | 503.18 Mt | 1996 | 396.42 Mt | 2015 | 332.15 Mt |
| 1978 | 521.19 Mt | 1997 | 388.14 Mt | 2016 | 334.77 Mt |
| 1979 | 528.76 Mt | 1998 | 410.11 Mt | 2017 | 338.71 Mt |
| 1980 | 506.79 Mt | 1999 | 403.85 Mt | 2018 | 328.55 Mt |
| 1981 | 456.45 Mt | 2000 | 400.87 Mt | 2019 | 322.9 Mt |
| 1982 | 435.4 Mt | 2001 | 404.98 Mt | 2020 | 287.09 Mt |
| 1983 | 416.26 Mt | 2002 | 399.58 Mt | 2021 | 316.7 Mt |
| 1984 | 404.7 Mt | 2003 | 404.48 Mt | 2022 | 307.68 Mt |
| 1985 | 394.43 Mt | 2004 | 405.51 Mt | 2023 | 284.15 Mt |
| 1986 | 382.32 Mt | 2005 | 407.76 Mt | 2024 | 274.45 Mt |
| 1987 | 375.49 Mt | 2006 | 397.02 Mt | | |
| 1988 | 375.56 Mt | 2007 | 389.86 Mt | | |
表を表示
| 1970 | 9.02 t | 1989 | 6.73 t | 2008 | 5.94 t |
| 1971 | 9.17 t | 1990 | 6.61 t | 2009 | 5.72 t |
| 1972 | 9.42 t | 1991 | 7 t | 2010 | 5.8 t |
| 1973 | 10.03 t | 1992 | 6.74 t | 2011 | 5.57 t |
| 1974 | 9.61 t | 1993 | 6.38 t | 2012 | 5.56 t |
| 1975 | 8.82 t | 1994 | 6.28 t | 2013 | 5.46 t |
| 1976 | 9.62 t | 1995 | 6.41 t | 2014 | 4.93 t |
| 1977 | 9.23 t | 1996 | 6.63 t | 2015 | 4.99 t |
| 1978 | 9.52 t | 1997 | 6.47 t | 2016 | 5.02 t |
| 1979 | 9.62 t | 1998 | 6.81 t | 2017 | 5.06 t |
| 1980 | 9.17 t | 1999 | 6.68 t | 2018 | 4.89 t |
| 1981 | 8.21 t | 2000 | 6.58 t | 2019 | 4.79 t |
| 1982 | 7.8 t | 2001 | 6.6 t | 2020 | 4.25 t |
| 1983 | 7.42 t | 2002 | 6.46 t | 2021 | 4.67 t |
| 1984 | 7.18 t | 2003 | 6.5 t | 2022 | 4.51 t |
| 1985 | 6.96 t | 2004 | 6.47 t | 2023 | 4.16 t |
| 1986 | 6.71 t | 2005 | 6.45 t | 2024 | 4 t |
| 1987 | 6.56 t | 2006 | 6.24 t | | |
| 1988 | 6.52 t | 2007 | 6.09 t | | |