Show data table
| 1970 | 0.3065 Mt | 1989 | 1.0403 Mt | 2008 | 3.4879 Mt |
| 1971 | 0.3066 Mt | 1990 | 1.1871 Mt | 2009 | 3.4382 Mt |
| 1972 | 0.3358 Mt | 1991 | 1.2714 Mt | 2010 | 3.6757 Mt |
| 1973 | 0.3741 Mt | 1992 | 1.3431 Mt | 2011 | 3.6565 Mt |
| 1974 | 0.4433 Mt | 1993 | 1.4807 Mt | 2012 | 3.7437 Mt |
| 1975 | 0.4618 Mt | 1994 | 1.525 Mt | 2013 | 3.8572 Mt |
| 1976 | 0.51 Mt | 1995 | 1.5621 Mt | 2014 | 3.9905 Mt |
| 1977 | 0.5919 Mt | 1996 | 1.6364 Mt | 2015 | 3.9907 Mt |
| 1978 | 0.6198 Mt | 1997 | 1.6434 Mt | 2016 | 4.0649 Mt |
| 1979 | 0.624 Mt | 1998 | 1.8025 Mt | 2017 | 4.2071 Mt |
| 1980 | 0.5825 Mt | 1999 | 2.2091 Mt | 2018 | 4.1718 Mt |
| 1981 | 0.6022 Mt | 2000 | 2.4433 Mt | 2019 | 4.2052 Mt |
| 1982 | 0.5545 Mt | 2001 | 2.5836 Mt | 2020 | 3.745 Mt |
| 1983 | 0.6307 Mt | 2002 | 2.6372 Mt | 2021 | 3.9879 Mt |
| 1984 | 0.6777 Mt | 2003 | 2.7615 Mt | 2022 | 4.0499 Mt |
| 1985 | 0.6364 Mt | 2004 | 2.7849 Mt | 2023 | 4.3225 Mt |
| 1986 | 0.7882 Mt | 2005 | 2.9793 Mt | 2024 | 4.4055 Mt |
| 1987 | 0.8335 Mt | 2006 | 3.3223 Mt | | |
| 1988 | 0.9229 Mt | 2007 | 3.4143 Mt | | |
Show data table
| 1970 | 0.37 t | 1989 | 0.99 t | 2008 | 2.8 t |
| 1971 | 0.37 t | 1990 | 1.12 t | 2009 | 2.76 t |
| 1972 | 0.39 t | 1991 | 1.19 t | 2010 | 2.94 t |
| 1973 | 0.43 t | 1992 | 1.24 t | 2011 | 2.92 t |
| 1974 | 0.5 t | 1993 | 1.35 t | 2012 | 2.98 t |
| 1975 | 0.52 t | 1994 | 1.37 t | 2013 | 3.06 t |
| 1976 | 0.56 t | 1995 | 1.39 t | 2014 | 3.16 t |
| 1977 | 0.64 t | 1996 | 1.44 t | 2015 | 3.16 t |
| 1978 | 0.66 t | 1997 | 1.43 t | 2016 | 3.22 t |
| 1979 | 0.66 t | 1998 | 1.55 t | 2017 | 3.33 t |
| 1980 | 0.6 t | 1999 | 1.88 t | 2018 | 3.3 t |
| 1981 | 0.61 t | 2000 | 2.06 t | 2019 | 3.32 t |
| 1982 | 0.56 t | 2001 | 2.16 t | 2020 | 2.96 t |
| 1983 | 0.63 t | 2002 | 2.19 t | 2021 | 3.15 t |
| 1984 | 0.67 t | 2003 | 2.28 t | 2022 | 3.21 t |
| 1985 | 0.62 t | 2004 | 2.28 t | 2023 | 3.46 t |
| 1986 | 0.77 t | 2005 | 2.43 t | 2024 | 3.54 t |
| 1987 | 0.8 t | 2006 | 2.69 t | | |
| 1988 | 0.88 t | 2007 | 2.75 t | | |