Show data table
| 1970 | 0.0301 Mt | 1989 | 0.0732 Mt | 2008 | 0.1496 Mt |
| 1971 | 0.03 Mt | 1990 | 0.0715 Mt | 2009 | 0.1613 Mt |
| 1972 | 0.0364 Mt | 1991 | 0.0718 Mt | 2010 | 0.1823 Mt |
| 1973 | 0.0368 Mt | 1992 | 0.0722 Mt | 2011 | 0.1412 Mt |
| 1974 | 0.0328 Mt | 1993 | 0.0703 Mt | 2012 | 0.1459 Mt |
| 1975 | 0.0396 Mt | 1994 | 0.0847 Mt | 2013 | 0.1667 Mt |
| 1976 | 0.036 Mt | 1995 | 0.0832 Mt | 2014 | 0.1778 Mt |
| 1977 | 0.0397 Mt | 1996 | 0.0825 Mt | 2015 | 0.1824 Mt |
| 1978 | 0.0397 Mt | 1997 | 0.0847 Mt | 2016 | 0.1964 Mt |
| 1979 | 0.0393 Mt | 1998 | 0.0867 Mt | 2017 | 0.1963 Mt |
| 1980 | 0.0389 Mt | 1999 | 0.0878 Mt | 2018 | 0.2592 Mt |
| 1981 | 0.0289 Mt | 2000 | 0.0968 Mt | 2019 | 0.2947 Mt |
| 1982 | 0.0357 Mt | 2001 | 0.1036 Mt | 2020 | 0.2776 Mt |
| 1983 | 0.0308 Mt | 2002 | 0.0975 Mt | 2021 | 0.2822 Mt |
| 1984 | 0.0342 Mt | 2003 | 0.1135 Mt | 2022 | 0.2961 Mt |
| 1985 | 0.0438 Mt | 2004 | 0.11 Mt | 2023 | 0.297 Mt |
| 1986 | 0.0457 Mt | 2005 | 0.1154 Mt | 2024 | 0.3075 Mt |
| 1987 | 0.0525 Mt | 2006 | 0.128 Mt | | |
| 1988 | 0.0714 Mt | 2007 | 0.1384 Mt | | |
Show data table
| 1970 | 0.29 t | 1989 | 0.54 t | 2008 | 0.89 t |
| 1971 | 0.29 t | 1990 | 0.52 t | 2009 | 0.95 t |
| 1972 | 0.34 t | 1991 | 0.51 t | 2010 | 1.07 t |
| 1973 | 0.34 t | 1992 | 0.51 t | 2011 | 0.82 t |
| 1974 | 0.3 t | 1993 | 0.49 t | 2012 | 0.85 t |
| 1975 | 0.36 t | 1994 | 0.58 t | 2013 | 0.96 t |
| 1976 | 0.32 t | 1995 | 0.56 t | 2014 | 1.02 t |
| 1977 | 0.35 t | 1996 | 0.55 t | 2015 | 1.04 t |
| 1978 | 0.34 t | 1997 | 0.56 t | 2016 | 1.12 t |
| 1979 | 0.33 t | 1998 | 0.56 t | 2017 | 1.11 t |
| 1980 | 0.33 t | 1999 | 0.56 t | 2018 | 1.46 t |
| 1981 | 0.24 t | 2000 | 0.61 t | 2019 | 1.66 t |
| 1982 | 0.29 t | 2001 | 0.65 t | 2020 | 1.56 t |
| 1983 | 0.25 t | 2002 | 0.6 t | 2021 | 1.58 t |
| 1984 | 0.27 t | 2003 | 0.7 t | 2022 | 1.66 t |
| 1985 | 0.34 t | 2004 | 0.67 t | 2023 | 1.66 t |
| 1986 | 0.35 t | 2005 | 0.7 t | 2024 | 1.71 t |
| 1987 | 0.39 t | 2006 | 0.77 t | | |
| 1988 | 0.53 t | 2007 | 0.82 t | | |