Show data table
| 1970 | 8.1401 Mt | 1989 | 13.28 Mt | 2008 | 3.7908 Mt |
| 1971 | 8.1736 Mt | 1990 | 12.32 Mt | 2009 | 3.05 Mt |
| 1972 | 8.5641 Mt | 1991 | 11.63 Mt | 2010 | 3.071 Mt |
| 1973 | 8.935 Mt | 1992 | 8.5568 Mt | 2011 | 3.0824 Mt |
| 1974 | 9.3205 Mt | 1993 | 5.7987 Mt | 2012 | 3.5021 Mt |
| 1975 | 9.9764 Mt | 1994 | 3.5887 Mt | 2013 | 3.5939 Mt |
| 1976 | 10.22 Mt | 1995 | 3.0457 Mt | 2014 | 4.7682 Mt |
| 1977 | 10.5 Mt | 1996 | 2.7006 Mt | 2015 | 5.0917 Mt |
| 1978 | 10.78 Mt | 1997 | 2.9766 Mt | 2016 | 5.7155 Mt |
| 1979 | 11.05 Mt | 1998 | 3.2154 Mt | 2017 | 6.934 Mt |
| 1980 | 11.57 Mt | 1999 | 2.9958 Mt | 2018 | 8.2044 Mt |
| 1981 | 11.63 Mt | 2000 | 2.7846 Mt | 2019 | 9.0405 Mt |
| 1982 | 11.68 Mt | 2001 | 2.7419 Mt | 2020 | 9.3881 Mt |
| 1983 | 11.86 Mt | 2002 | 2.7554 Mt | 2021 | 9.4268 Mt |
| 1984 | 11.82 Mt | 2003 | 2.8163 Mt | 2022 | 9.5606 Mt |
| 1985 | 12.32 Mt | 2004 | 3.3521 Mt | 2023 | 9.3204 Mt |
| 1986 | 12.78 Mt | 2005 | 3.1911 Mt | 2024 | 9.7699 Mt |
| 1987 | 12.99 Mt | 2006 | 3.4897 Mt | | |
| 1988 | 13.2 Mt | 2007 | 4.0503 Mt | | |
Show data table
| 1970 | 2.77 t | 1989 | 2.52 t | 2008 | 0.52 t |
| 1971 | 2.7 t | 1990 | 2.28 t | 2009 | 0.41 t |
| 1972 | 2.74 t | 1991 | 2.1 t | 2010 | 0.4 t |
| 1973 | 2.77 t | 1992 | 1.51 t | 2011 | 0.39 t |
| 1974 | 2.8 t | 1993 | 1.01 t | 2012 | 0.44 t |
| 1975 | 2.91 t | 1994 | 0.62 t | 2013 | 0.44 t |
| 1976 | 2.89 t | 1995 | 0.51 t | 2014 | 0.57 t |
| 1977 | 2.87 t | 1996 | 0.45 t | 2015 | 0.59 t |
| 1978 | 2.86 t | 1997 | 0.48 t | 2016 | 0.64 t |
| 1979 | 2.85 t | 1998 | 0.52 t | 2017 | 0.76 t |
| 1980 | 2.9 t | 1999 | 0.48 t | 2018 | 0.88 t |
| 1981 | 2.83 t | 2000 | 0.44 t | 2019 | 0.95 t |
| 1982 | 2.76 t | 2001 | 0.43 t | 2020 | 0.96 t |
| 1983 | 2.73 t | 2002 | 0.42 t | 2021 | 0.95 t |
| 1984 | 2.64 t | 2003 | 0.42 t | 2022 | 0.94 t |
| 1985 | 2.67 t | 2004 | 0.49 t | 2023 | 0.9 t |
| 1986 | 2.68 t | 2005 | 0.46 t | 2024 | 0.92 t |
| 1987 | 2.63 t | 2006 | 0.49 t | | |
| 1988 | 2.58 t | 2007 | 0.56 t | | |