Show data table
| 1970 | 0.0254 Mt | 1989 | 0.1976 Mt | 2008 | 0.4545 Mt |
| 1971 | 0.029 Mt | 1990 | 0.201 Mt | 2009 | 0.4933 Mt |
| 1972 | 0.0396 Mt | 1991 | 0.2264 Mt | 2010 | 0.4828 Mt |
| 1973 | 0.0445 Mt | 1992 | 0.2508 Mt | 2011 | 0.2907 Mt |
| 1974 | 0.0436 Mt | 1993 | 0.2516 Mt | 2012 | 0.3754 Mt |
| 1975 | 0.0576 Mt | 1994 | 0.2858 Mt | 2013 | 0.4128 Mt |
| 1976 | 0.0566 Mt | 1995 | 0.3144 Mt | 2014 | 0.4411 Mt |
| 1977 | 0.0673 Mt | 1996 | 0.2068 Mt | 2015 | 0.4625 Mt |
| 1978 | 0.0721 Mt | 1997 | 0.343 Mt | 2016 | 0.4854 Mt |
| 1979 | 0.0761 Mt | 1998 | 0.3512 Mt | 2017 | 0.4671 Mt |
| 1980 | 0.0799 Mt | 1999 | 0.3559 Mt | 2018 | 0.4653 Mt |
| 1981 | 0.0831 Mt | 2000 | 0.2689 Mt | 2019 | 0.5095 Mt |
| 1982 | 0.082 Mt | 2001 | 0.2719 Mt | 2020 | 0.4887 Mt |
| 1983 | 0.0846 Mt | 2002 | 0.297 Mt | 2021 | 0.5074 Mt |
| 1984 | 0.0988 Mt | 2003 | 0.3424 Mt | 2022 | 0.5355 Mt |
| 1985 | 0.1043 Mt | 2004 | 0.3494 Mt | 2023 | 0.5371 Mt |
| 1986 | 0.1139 Mt | 2005 | 0.3853 Mt | 2024 | 0.556 Mt |
| 1987 | 0.1289 Mt | 2006 | 0.4242 Mt | | |
| 1988 | 0.143 Mt | 2007 | 0.4581 Mt | | |
Show data table
| 1970 | 0.43 t | 1989 | 3.27 t | 2008 | 4.5 t |
| 1971 | 0.49 t | 1990 | 3.2 t | 2009 | 4.86 t |
| 1972 | 0.68 t | 1991 | 3.44 t | 2010 | 4.74 t |
| 1973 | 0.76 t | 1992 | 3.63 t | 2011 | 2.83 t |
| 1974 | 0.75 t | 1993 | 3.41 t | 2012 | 3.61 t |
| 1975 | 0.99 t | 1994 | 3.68 t | 2013 | 3.91 t |
| 1976 | 0.97 t | 1995 | 3.94 t | 2014 | 4.13 t |
| 1977 | 1.15 t | 1996 | 2.49 t | 2015 | 4.29 t |
| 1978 | 1.23 t | 1997 | 3.97 t | 2016 | 4.46 t |
| 1979 | 1.29 t | 1998 | 3.97 t | 2017 | 4.3 t |
| 1980 | 1.33 t | 1999 | 3.97 t | 2018 | 4.27 t |
| 1981 | 1.37 t | 2000 | 2.97 t | 2019 | 4.67 t |
| 1982 | 1.34 t | 2001 | 2.97 t | 2020 | 4.5 t |
| 1983 | 1.36 t | 2002 | 3.23 t | 2021 | 4.71 t |
| 1984 | 1.57 t | 2003 | 3.68 t | 2022 | 4.99 t |
| 1985 | 1.69 t | 2004 | 3.67 t | 2023 | 5 t |
| 1986 | 1.9 t | 2005 | 3.95 t | 2024 | 5.15 t |
| 1987 | 2.18 t | 2006 | 4.27 t | | |
| 1988 | 2.41 t | 2007 | 4.57 t | | |