Show data table
| 1970 | 1.4344 Mt | 1989 | 2.8839 Mt | 2008 | 7.6303 Mt |
| 1971 | 1.4475 Mt | 1990 | 2.9164 Mt | 2009 | 7.3188 Mt |
| 1972 | 1.6223 Mt | 1991 | 3.1538 Mt | 2010 | 7.2362 Mt |
| 1973 | 1.8329 Mt | 1992 | 4.2433 Mt | 2011 | 7.6984 Mt |
| 1974 | 1.7991 Mt | 1993 | 4.2651 Mt | 2012 | 7.6394 Mt |
| 1975 | 1.9722 Mt | 1994 | 5.0045 Mt | 2013 | 7.9353 Mt |
| 1976 | 2.0296 Mt | 1995 | 4.9676 Mt | 2014 | 8.0462 Mt |
| 1977 | 2.5574 Mt | 1996 | 4.7451 Mt | 2015 | 7.7578 Mt |
| 1978 | 2.7633 Mt | 1997 | 4.6808 Mt | 2016 | 8.2325 Mt |
| 1979 | 2.7562 Mt | 1998 | 5.1796 Mt | 2017 | 8.396 Mt |
| 1980 | 2.4917 Mt | 1999 | 5.1692 Mt | 2018 | 8.4405 Mt |
| 1981 | 2.3074 Mt | 2000 | 5.1314 Mt | 2019 | 8.193 Mt |
| 1982 | 1.9729 Mt | 2001 | 5.5322 Mt | 2020 | 7.1754 Mt |
| 1983 | 2.0027 Mt | 2002 | 5.6463 Mt | 2021 | 8.0531 Mt |
| 1984 | 2.0792 Mt | 2003 | 6.0688 Mt | 2022 | 8.1977 Mt |
| 1985 | 2.1919 Mt | 2004 | 6.1802 Mt | 2023 | 8.0978 Mt |
| 1986 | 2.2875 Mt | 2005 | 6.3561 Mt | 2024 | 8.3763 Mt |
| 1987 | 2.4117 Mt | 2006 | 6.9054 Mt | | |
| 1988 | 2.5532 Mt | 2007 | 7.7137 Mt | | |
Show data table
| 1970 | 0.78 t | 1989 | 0.95 t | 2008 | 1.72 t |
| 1971 | 0.77 t | 1990 | 0.93 t | 2009 | 1.63 t |
| 1972 | 0.84 t | 1991 | 0.98 t | 2010 | 1.59 t |
| 1973 | 0.92 t | 1992 | 1.29 t | 2011 | 1.67 t |
| 1974 | 0.88 t | 1993 | 1.27 t | 2012 | 1.64 t |
| 1975 | 0.94 t | 1994 | 1.45 t | 2013 | 1.68 t |
| 1976 | 0.94 t | 1995 | 1.41 t | 2014 | 1.69 t |
| 1977 | 1.16 t | 1996 | 1.31 t | 2015 | 1.61 t |
| 1978 | 1.22 t | 1997 | 1.26 t | 2016 | 1.69 t |
| 1979 | 1.18 t | 1998 | 1.37 t | 2017 | 1.71 t |
| 1980 | 1.04 t | 1999 | 1.34 t | 2018 | 1.7 t |
| 1981 | 0.94 t | 2000 | 1.3 t | 2019 | 1.64 t |
| 1982 | 0.78 t | 2001 | 1.38 t | 2020 | 1.43 t |
| 1983 | 0.77 t | 2002 | 1.39 t | 2021 | 1.59 t |
| 1984 | 0.78 t | 2003 | 1.47 t | 2022 | 1.61 t |
| 1985 | 0.8 t | 2004 | 1.47 t | 2023 | 1.59 t |
| 1986 | 0.81 t | 2005 | 1.49 t | 2024 | 1.63 t |
| 1987 | 0.83 t | 2006 | 1.6 t | | |
| 1988 | 0.86 t | 2007 | 1.76 t | | |