Show data table
| 1970 | 1.5025 Mt | 1989 | 1.234 Mt | 2008 | 1.6055 Mt |
| 1971 | 1.5025 Mt | 1990 | 1.1737 Mt | 2009 | 1.629 Mt |
| 1972 | 1.5246 Mt | 1991 | 1.1459 Mt | 2010 | 1.7612 Mt |
| 1973 | 1.7661 Mt | 1992 | 1.0825 Mt | 2011 | 1.8334 Mt |
| 1974 | 1.5581 Mt | 1993 | 1.0888 Mt | 2012 | 2.0026 Mt |
| 1975 | 1.8403 Mt | 1994 | 1.4149 Mt | 2013 | 1.9774 Mt |
| 1976 | 1.8655 Mt | 1995 | 1.5324 Mt | 2014 | 2.0651 Mt |
| 1977 | 1.8685 Mt | 1996 | 1.5818 Mt | 2015 | 2.0746 Mt |
| 1978 | 1.7606 Mt | 1997 | 1.724 Mt | 2016 | 2.4564 Mt |
| 1979 | 1.6812 Mt | 1998 | 1.7494 Mt | 2017 | 2.4688 Mt |
| 1980 | 1.7731 Mt | 1999 | 1.7376 Mt | 2018 | 2.5808 Mt |
| 1981 | 1.7728 Mt | 2000 | 1.6621 Mt | 2019 | 2.7934 Mt |
| 1982 | 1.4426 Mt | 2001 | 1.6456 Mt | 2020 | 3.3298 Mt |
| 1983 | 1.2941 Mt | 2002 | 1.6237 Mt | 2021 | 3.3211 Mt |
| 1984 | 1.4026 Mt | 2003 | 1.6197 Mt | 2022 | 3.684 Mt |
| 1985 | 1.4407 Mt | 2004 | 1.6735 Mt | 2023 | 3.7405 Mt |
| 1986 | 1.3645 Mt | 2005 | 1.4834 Mt | 2024 | 3.7886 Mt |
| 1987 | 1.3454 Mt | 2006 | 1.3346 Mt | | |
| 1988 | 1.3954 Mt | 2007 | 1.607 Mt | | |
Show data table
| 1970 | 2.14 t | 1989 | 1.63 t | 2008 | 2.13 t |
| 1971 | 2.11 t | 1990 | 1.57 t | 2009 | 2.17 t |
| 1972 | 2.11 t | 1991 | 1.53 t | 2010 | 2.35 t |
| 1973 | 2.42 t | 1992 | 1.44 t | 2011 | 2.46 t |
| 1974 | 2.11 t | 1993 | 1.45 t | 2012 | 2.68 t |
| 1975 | 2.47 t | 1994 | 1.87 t | 2013 | 2.64 t |
| 1976 | 2.48 t | 1995 | 2.02 t | 2014 | 2.74 t |
| 1977 | 2.46 t | 1996 | 2.08 t | 2015 | 2.73 t |
| 1978 | 2.3 t | 1997 | 2.26 t | 2016 | 3.22 t |
| 1979 | 2.18 t | 1998 | 2.29 t | 2017 | 3.21 t |
| 1980 | 2.29 t | 1999 | 2.27 t | 2018 | 3.26 t |
| 1981 | 2.28 t | 2000 | 2.17 t | 2019 | 3.46 t |
| 1982 | 1.86 t | 2001 | 2.15 t | 2020 | 4.12 t |
| 1983 | 1.67 t | 2002 | 2.13 t | 2021 | 4.07 t |
| 1984 | 1.81 t | 2003 | 2.12 t | 2022 | 4.48 t |
| 1985 | 1.87 t | 2004 | 2.19 t | 2023 | 4.53 t |
| 1986 | 1.78 t | 2005 | 1.95 t | 2024 | 4.56 t |
| 1987 | 1.76 t | 2006 | 1.76 t | | |
| 1988 | 1.84 t | 2007 | 2.12 t | | |