Show data table
| 1970 | 0.3332 Mt | 1989 | 0.8891 Mt | 2008 | 2.1028 Mt |
| 1971 | 0.3347 Mt | 1990 | 0.7071 Mt | 2009 | 2.0973 Mt |
| 1972 | 0.3369 Mt | 1991 | 0.8966 Mt | 2010 | 2.1069 Mt |
| 1973 | 0.3492 Mt | 1992 | 2.2897 Mt | 2011 | 2.265 Mt |
| 1974 | 0.3742 Mt | 1993 | 2.267 Mt | 2012 | 2.5265 Mt |
| 1975 | 0.3899 Mt | 1994 | 2.3567 Mt | 2013 | 2.3153 Mt |
| 1976 | 0.4024 Mt | 1995 | 2.4527 Mt | 2014 | 2.6827 Mt |
| 1977 | 0.4156 Mt | 1996 | 2.4292 Mt | 2015 | 2.757 Mt |
| 1978 | 0.4231 Mt | 1997 | 2.3872 Mt | 2016 | 2.6247 Mt |
| 1979 | 0.4793 Mt | 1998 | 2.44 Mt | 2017 | 3.809 Mt |
| 1980 | 0.4765 Mt | 1999 | 2.5178 Mt | 2018 | 4.4355 Mt |
| 1981 | 0.4394 Mt | 2000 | 1.0582 Mt | 2019 | 4.4862 Mt |
| 1982 | 0.4108 Mt | 2001 | 1.1705 Mt | 2020 | 4.6354 Mt |
| 1983 | 0.4459 Mt | 2002 | 1.2997 Mt | 2021 | 4.4111 Mt |
| 1984 | 0.6234 Mt | 2003 | 1.363 Mt | 2022 | 5.0263 Mt |
| 1985 | 0.6187 Mt | 2004 | 1.4867 Mt | 2023 | 4.8274 Mt |
| 1986 | 0.3867 Mt | 2005 | 1.5383 Mt | 2024 | 5.0116 Mt |
| 1987 | 0.7058 Mt | 2006 | 1.6904 Mt | | |
| 1988 | 0.836 Mt | 2007 | 1.8808 Mt | | |
Show data table
| 1970 | 0.3 t | 1989 | 0.47 t | 2008 | 0.66 t |
| 1971 | 0.3 t | 1990 | 0.36 t | 2009 | 0.64 t |
| 1972 | 0.29 t | 1991 | 0.45 t | 2010 | 0.62 t |
| 1973 | 0.29 t | 1992 | 1.1 t | 2011 | 0.65 t |
| 1974 | 0.3 t | 1993 | 1.04 t | 2012 | 0.7 t |
| 1975 | 0.31 t | 1994 | 1.05 t | 2013 | 0.62 t |
| 1976 | 0.31 t | 1995 | 1.06 t | 2014 | 0.7 t |
| 1977 | 0.31 t | 1996 | 1.03 t | 2015 | 0.7 t |
| 1978 | 0.3 t | 1997 | 0.99 t | 2016 | 0.64 t |
| 1979 | 0.33 t | 1998 | 0.99 t | 2017 | 0.9 t |
| 1980 | 0.32 t | 1999 | 0.99 t | 2018 | 1.02 t |
| 1981 | 0.29 t | 2000 | 0.4 t | 2019 | 1 t |
| 1982 | 0.26 t | 2001 | 0.44 t | 2020 | 1.01 t |
| 1983 | 0.28 t | 2002 | 0.47 t | 2021 | 0.93 t |
| 1984 | 0.38 t | 2003 | 0.49 t | 2022 | 1.03 t |
| 1985 | 0.36 t | 2004 | 0.52 t | 2023 | 0.96 t |
| 1986 | 0.22 t | 2005 | 0.52 t | 2024 | 0.97 t |
| 1987 | 0.39 t | 2006 | 0.56 t | | |
| 1988 | 0.45 t | 2007 | 0.61 t | | |