Show data table
| 1970 | 28.86 Mt | 1989 | 33.98 Mt | 2008 | 71.32 Mt |
| 1971 | 31.31 Mt | 1990 | 33.22 Mt | 2009 | 68.23 Mt |
| 1972 | 32.65 Mt | 1991 | 31.79 Mt | 2010 | 72.32 Mt |
| 1973 | 32.57 Mt | 1992 | 32.87 Mt | 2011 | 79.08 Mt |
| 1974 | 30.73 Mt | 1993 | 34.91 Mt | 2012 | 81.35 Mt |
| 1975 | 27.94 Mt | 1994 | 38.14 Mt | 2013 | 85.41 Mt |
| 1976 | 28.57 Mt | 1995 | 41.79 Mt | 2014 | 78.7 Mt |
| 1977 | 26.67 Mt | 1996 | 47.89 Mt | 2015 | 84.38 Mt |
| 1978 | 27.37 Mt | 1997 | 54.36 Mt | 2016 | 88.87 Mt |
| 1979 | 29 Mt | 1998 | 54.86 Mt | 2017 | 89.75 Mt |
| 1980 | 28.85 Mt | 1999 | 57.4 Mt | 2018 | 89.82 Mt |
| 1981 | 26.37 Mt | 2000 | 53.86 Mt | 2019 | 95.25 Mt |
| 1982 | 22.36 Mt | 2001 | 51.66 Mt | 2020 | 87.51 Mt |
| 1983 | 22.87 Mt | 2002 | 52.2 Mt | 2021 | 89.11 Mt |
| 1984 | 24.1 Mt | 2003 | 54.13 Mt | 2022 | 90.43 Mt |
| 1985 | 23.26 Mt | 2004 | 58.5 Mt | 2023 | 77.01 Mt |
| 1986 | 23.54 Mt | 2005 | 59.14 Mt | 2024 | 77.82 Mt |
| 1987 | 23.77 Mt | 2006 | 60.36 Mt | | |
| 1988 | 28.28 Mt | 2007 | 67.75 Mt | | |
Show data table
| 1970 | 2.93 t | 1989 | 2.57 t | 2008 | 4.24 t |
| 1971 | 3.13 t | 1990 | 2.47 t | 2009 | 4.01 t |
| 1972 | 3.21 t | 1991 | 2.33 t | 2010 | 4.21 t |
| 1973 | 3.15 t | 1992 | 2.37 t | 2011 | 4.56 t |
| 1974 | 2.93 t | 1993 | 2.48 t | 2012 | 4.64 t |
| 1975 | 2.62 t | 1994 | 2.66 t | 2013 | 4.83 t |
| 1976 | 2.64 t | 1995 | 2.88 t | 2014 | 4.41 t |
| 1977 | 2.42 t | 1996 | 3.25 t | 2015 | 4.68 t |
| 1978 | 2.45 t | 1997 | 3.64 t | 2016 | 4.86 t |
| 1979 | 2.56 t | 1998 | 3.63 t | 2017 | 4.84 t |
| 1980 | 2.51 t | 1999 | 3.75 t | 2018 | 4.75 t |
| 1981 | 2.26 t | 2000 | 3.47 t | 2019 | 4.96 t |
| 1982 | 1.89 t | 2001 | 3.29 t | 2020 | 4.52 t |
| 1983 | 1.9 t | 2002 | 3.29 t | 2021 | 4.58 t |
| 1984 | 1.97 t | 2003 | 3.38 t | 2022 | 4.62 t |
| 1985 | 1.88 t | 2004 | 3.61 t | 2023 | 3.92 t |
| 1986 | 1.87 t | 2005 | 3.62 t | 2024 | 3.94 t |
| 1987 | 1.86 t | 2006 | 3.66 t | | |
| 1988 | 2.18 t | 2007 | 4.06 t | | |