Show data table
| 1970 | 11.24 Mt | 1989 | 19.6 Mt | 2008 | 21.65 Mt |
| 1971 | 11.28 Mt | 1990 | 24.57 Mt | 2009 | 21.66 Mt |
| 1972 | 11.09 Mt | 1991 | 21.99 Mt | 2010 | 22.22 Mt |
| 1973 | 12.09 Mt | 1992 | 16.23 Mt | 2011 | 25.27 Mt |
| 1974 | 13.07 Mt | 1993 | 13.62 Mt | 2012 | 23.31 Mt |
| 1975 | 13.34 Mt | 1994 | 3.3002 Mt | 2013 | 23.21 Mt |
| 1976 | 13.23 Mt | 1995 | 3.5148 Mt | 2014 | 20.8 Mt |
| 1977 | 13.94 Mt | 1996 | 4.3994 Mt | 2015 | 20.83 Mt |
| 1978 | 14.62 Mt | 1997 | 8.7233 Mt | 2016 | 23.51 Mt |
| 1979 | 15.13 Mt | 1998 | 11.05 Mt | 2017 | 23.99 Mt |
| 1980 | 14.59 Mt | 1999 | 10.89 Mt | 2018 | 24.06 Mt |
| 1981 | 16.21 Mt | 2000 | 14.28 Mt | 2019 | 22.6 Mt |
| 1982 | 16.74 Mt | 2001 | 14.1 Mt | 2020 | 22.54 Mt |
| 1983 | 17.73 Mt | 2002 | 14.83 Mt | 2021 | 23.01 Mt |
| 1984 | 18.51 Mt | 2003 | 15.19 Mt | 2022 | 22.4 Mt |
| 1985 | 19.51 Mt | 2004 | 16.03 Mt | 2023 | 20.83 Mt |
| 1986 | 20.45 Mt | 2005 | 16.85 Mt | 2024 | 20.41 Mt |
| 1987 | 18.89 Mt | 2006 | 18.69 Mt | | |
| 1988 | 19.27 Mt | 2007 | 19.73 Mt | | |
Show data table
| 1970 | 2.98 t | 1989 | 4.42 t | 2008 | 5.49 t |
| 1971 | 2.96 t | 1990 | 5.52 t | 2009 | 5.58 t |
| 1972 | 2.88 t | 1991 | 4.93 t | 2010 | 5.83 t |
| 1973 | 3.11 t | 1992 | 3.83 t | 2011 | 6.75 t |
| 1974 | 3.33 t | 1993 | 3.49 t | 2012 | 6.35 t |
| 1975 | 3.36 t | 1994 | 0.89 t | 2013 | 6.43 t |
| 1976 | 3.3 t | 1995 | 0.95 t | 2014 | 5.83 t |
| 1977 | 3.45 t | 1996 | 1.14 t | 2015 | 5.92 t |
| 1978 | 3.58 t | 1997 | 2.17 t | 2016 | 6.77 t |
| 1979 | 3.68 t | 1998 | 2.7 t | 2017 | 7 t |
| 1980 | 3.52 t | 1999 | 2.64 t | 2018 | 7.1 t |
| 1981 | 3.87 t | 2000 | 3.43 t | 2019 | 6.75 t |
| 1982 | 3.97 t | 2001 | 3.37 t | 2020 | 6.83 t |
| 1983 | 4.16 t | 2002 | 3.54 t | 2021 | 7.09 t |
| 1984 | 4.31 t | 2003 | 3.63 t | 2022 | 6.99 t |
| 1985 | 4.51 t | 2004 | 3.87 t | 2023 | 6.54 t |
| 1986 | 4.69 t | 2005 | 4.11 t | 2024 | 6.45 t |
| 1987 | 4.3 t | 2006 | 4.6 t | | |
| 1988 | 4.37 t | 2007 | 4.91 t | | |