Show data table
| 1970 | 1.7328 Mt | 1989 | 2.8825 Mt | 2008 | 3.9029 Mt |
| 1971 | 1.7326 Mt | 1990 | 2.9084 Mt | 2009 | 6.1659 Mt |
| 1972 | 1.6924 Mt | 1991 | 2.8332 Mt | 2010 | 7.8684 Mt |
| 1973 | 1.7325 Mt | 1992 | 1.8107 Mt | 2011 | 11.52 Mt |
| 1974 | 2.1886 Mt | 1993 | 1.7729 Mt | 2012 | 9.8844 Mt |
| 1975 | 2.0276 Mt | 1994 | 1.6737 Mt | 2013 | 8.4287 Mt |
| 1976 | 1.8913 Mt | 1995 | 1.4526 Mt | 2014 | 7.9588 Mt |
| 1977 | 2.2811 Mt | 1996 | 1.4056 Mt | 2015 | 8.4272 Mt |
| 1978 | 1.9327 Mt | 1997 | 1.3735 Mt | 2016 | 7.6117 Mt |
| 1979 | 2.0577 Mt | 1998 | 1.4093 Mt | 2017 | 10.4 Mt |
| 1980 | 2.0047 Mt | 1999 | 1.3633 Mt | 2018 | 11.81 Mt |
| 1981 | 2.2581 Mt | 2000 | 1.0093 Mt | 2019 | 12.1 Mt |
| 1982 | 2.3078 Mt | 2001 | 0.9402 Mt | 2020 | 12.14 Mt |
| 1983 | 2.9981 Mt | 2002 | 0.9388 Mt | 2021 | 12.49 Mt |
| 1984 | 3.2205 Mt | 2003 | 1.0172 Mt | 2022 | 11.3 Mt |
| 1985 | 4.1138 Mt | 2004 | 0.9024 Mt | 2023 | 11.65 Mt |
| 1986 | 3.9312 Mt | 2005 | 1.2763 Mt | 2024 | 12.07 Mt |
| 1987 | 3.261 Mt | 2006 | 1.4185 Mt | | |
| 1988 | 3.0734 Mt | 2007 | 2.0642 Mt | | |
Show data table
| 1970 | 0.15 t | 1989 | 0.24 t | 2008 | 0.15 t |
| 1971 | 0.15 t | 1990 | 0.24 t | 2009 | 0.22 t |
| 1972 | 0.14 t | 1991 | 0.23 t | 2010 | 0.28 t |
| 1973 | 0.14 t | 1992 | 0.14 t | 2011 | 0.39 t |
| 1974 | 0.18 t | 1993 | 0.12 t | 2012 | 0.32 t |
| 1975 | 0.16 t | 1994 | 0.1 t | 2013 | 0.27 t |
| 1976 | 0.14 t | 1995 | 0.09 t | 2014 | 0.24 t |
| 1977 | 0.17 t | 1996 | 0.08 t | 2015 | 0.25 t |
| 1978 | 0.14 t | 1997 | 0.07 t | 2016 | 0.22 t |
| 1979 | 0.15 t | 1998 | 0.07 t | 2017 | 0.29 t |
| 1980 | 0.15 t | 1999 | 0.07 t | 2018 | 0.32 t |
| 1981 | 0.19 t | 2000 | 0.05 t | 2019 | 0.32 t |
| 1982 | 0.21 t | 2001 | 0.05 t | 2020 | 0.31 t |
| 1983 | 0.27 t | 2002 | 0.04 t | 2021 | 0.31 t |
| 1984 | 0.29 t | 2003 | 0.04 t | 2022 | 0.28 t |
| 1985 | 0.36 t | 2004 | 0.04 t | 2023 | 0.28 t |
| 1986 | 0.34 t | 2005 | 0.05 t | 2024 | 0.28 t |
| 1987 | 0.29 t | 2006 | 0.06 t | | |
| 1988 | 0.27 t | 2007 | 0.08 t | | |