Show data table
| 1970 | 6.339 Mt | 1989 | 28.67 Mt | 2008 | 66.68 Mt |
| 1971 | 6.3711 Mt | 1990 | 33 Mt | 2009 | 62.41 Mt |
| 1972 | 6.1415 Mt | 1991 | 36.11 Mt | 2010 | 62.69 Mt |
| 1973 | 5.8373 Mt | 1992 | 35.88 Mt | 2011 | 58.62 Mt |
| 1974 | 7.9431 Mt | 1993 | 36.87 Mt | 2012 | 46.25 Mt |
| 1975 | 9.2947 Mt | 1994 | 38.88 Mt | 2013 | 31.2 Mt |
| 1976 | 10.68 Mt | 1995 | 40.51 Mt | 2014 | 30.99 Mt |
| 1977 | 11.75 Mt | 1996 | 43.53 Mt | 2015 | 28.14 Mt |
| 1978 | 12.05 Mt | 1997 | 43.34 Mt | 2016 | 25.88 Mt |
| 1979 | 15.34 Mt | 1998 | 46.02 Mt | 2017 | 31.08 Mt |
| 1980 | 14.37 Mt | 1999 | 45.21 Mt | 2018 | 34 Mt |
| 1981 | 16.17 Mt | 2000 | 45.9 Mt | 2019 | 33.32 Mt |
| 1982 | 19.14 Mt | 2001 | 46.01 Mt | 2020 | 31.75 Mt |
| 1983 | 22.61 Mt | 2002 | 45.83 Mt | 2021 | 32.04 Mt |
| 1984 | 25.34 Mt | 2003 | 45.98 Mt | 2022 | 31.17 Mt |
| 1985 | 22.86 Mt | 2004 | 48.03 Mt | 2023 | 31.36 Mt |
| 1986 | 23.84 Mt | 2005 | 58.81 Mt | 2024 | 31.45 Mt |
| 1987 | 30.28 Mt | 2006 | 61.57 Mt | | |
| 1988 | 29.71 Mt | 2007 | 65.02 Mt | | |
Show data table
| 1970 | 0.99 t | 1989 | 2.35 t | 2008 | 3.08 t |
| 1971 | 0.97 t | 1990 | 2.62 t | 2009 | 2.84 t |
| 1972 | 0.9 t | 1991 | 2.78 t | 2010 | 2.79 t |
| 1973 | 0.83 t | 1992 | 2.68 t | 2011 | 2.56 t |
| 1974 | 1.09 t | 1993 | 2.67 t | 2012 | 2.03 t |
| 1975 | 1.23 t | 1994 | 2.74 t | 2013 | 1.44 t |
| 1976 | 1.37 t | 1995 | 2.77 t | 2014 | 1.53 t |
| 1977 | 1.45 t | 1996 | 2.9 t | 2015 | 1.45 t |
| 1978 | 1.44 t | 1997 | 2.81 t | 2016 | 1.35 t |
| 1979 | 1.77 t | 1998 | 2.91 t | 2017 | 1.62 t |
| 1980 | 1.6 t | 1999 | 2.79 t | 2018 | 1.74 t |
| 1981 | 1.75 t | 2000 | 2.76 t | 2019 | 1.64 t |
| 1982 | 2 t | 2001 | 2.7 t | 2020 | 1.51 t |
| 1983 | 2.28 t | 2002 | 2.62 t | 2021 | 1.48 t |
| 1984 | 2.47 t | 2003 | 2.57 t | 2022 | 1.39 t |
| 1985 | 2.15 t | 2004 | 2.62 t | 2023 | 1.33 t |
| 1986 | 2.17 t | 2005 | 3.13 t | 2024 | 1.27 t |
| 1987 | 2.66 t | 2006 | 3.14 t | | |
| 1988 | 2.52 t | 2007 | 3.11 t | | |