Show data table
| 1970 | 309.11 Mt | 1989 | 447.11 Mt | 2008 | 324.58 Mt |
| 1971 | 317.57 Mt | 1990 | 371.52 Mt | 2009 | 311.38 Mt |
| 1972 | 330.89 Mt | 1991 | 369.23 Mt | 2010 | 329.38 Mt |
| 1973 | 348.58 Mt | 1992 | 360.32 Mt | 2011 | 326.94 Mt |
| 1974 | 361.75 Mt | 1993 | 360.77 Mt | 2012 | 319.73 Mt |
| 1975 | 376.97 Mt | 1994 | 354.66 Mt | 2013 | 315.09 Mt |
| 1976 | 401.7 Mt | 1995 | 356.44 Mt | 2014 | 302.57 Mt |
| 1977 | 416.31 Mt | 1996 | 372.45 Mt | 2015 | 305.79 Mt |
| 1978 | 444.21 Mt | 1997 | 362.67 Mt | 2016 | 316.73 Mt |
| 1979 | 444.84 Mt | 1998 | 334.07 Mt | 2017 | 330.22 Mt |
| 1980 | 456.3 Mt | 1999 | 324.65 Mt | 2018 | 329.63 Mt |
| 1981 | 418.96 Mt | 2000 | 313.03 Mt | 2019 | 312.07 Mt |
| 1982 | 425.2 Mt | 2001 | 309.76 Mt | 2020 | 296.88 Mt |
| 1983 | 429.17 Mt | 2002 | 302.51 Mt | 2021 | 324.01 Mt |
| 1984 | 444.48 Mt | 2003 | 315.3 Mt | 2022 | 307.96 Mt |
| 1985 | 454.63 Mt | 2004 | 317.49 Mt | 2023 | 280.65 Mt |
| 1986 | 462.25 Mt | 2005 | 317.1 Mt | 2024 | 276.06 Mt |
| 1987 | 478.2 Mt | 2006 | 330.75 Mt | | |
| 1988 | 468.01 Mt | 2007 | 330.3 Mt | | |
Show data table
| 1970 | 9.46 t | 1989 | 11.78 t | 2008 | 8.51 t |
| 1971 | 9.69 t | 1990 | 9.75 t | 2009 | 8.16 t |
| 1972 | 10.01 t | 1991 | 9.65 t | 2010 | 8.66 t |
| 1973 | 10.45 t | 1992 | 9.39 t | 2011 | 8.59 t |
| 1974 | 10.74 t | 1993 | 9.38 t | 2012 | 8.4 t |
| 1975 | 11.08 t | 1994 | 9.2 t | 2013 | 8.28 t |
| 1976 | 11.69 t | 1995 | 9.24 t | 2014 | 7.96 t |
| 1977 | 12 t | 1996 | 9.64 t | 2015 | 8.05 t |
| 1978 | 12.7 t | 1997 | 9.38 t | 2016 | 8.34 t |
| 1979 | 12.62 t | 1998 | 8.64 t | 2017 | 8.7 t |
| 1980 | 12.83 t | 1999 | 8.4 t | 2018 | 8.68 t |
| 1981 | 11.67 t | 2000 | 8.18 t | 2019 | 8.22 t |
| 1982 | 11.74 t | 2001 | 8.1 t | 2020 | 7.91 t |
| 1983 | 11.74 t | 2002 | 7.91 t | 2021 | 8.76 t |
| 1984 | 12.04 t | 2003 | 8.25 t | 2022 | 8.36 t |
| 1985 | 12.22 t | 2004 | 8.32 t | 2023 | 7.65 t |
| 1986 | 12.34 t | 2005 | 8.31 t | 2024 | 7.55 t |
| 1987 | 12.7 t | 2006 | 8.67 t | | |
| 1988 | 12.37 t | 2007 | 8.66 t | | |