Show data table
| 1970 | 8.0512 Mt | 1989 | 6.4715 Mt | 2008 | 9.8705 Mt |
| 1971 | 8.0388 Mt | 1990 | 7.7041 Mt | 2009 | 8.0493 Mt |
| 1972 | 8.0073 Mt | 1991 | 7.6039 Mt | 2010 | 7.6922 Mt |
| 1973 | 8.5489 Mt | 1992 | 8.3025 Mt | 2011 | 7.6033 Mt |
| 1974 | 8.8517 Mt | 1993 | 8.4375 Mt | 2012 | 7.014 Mt |
| 1975 | 7.4421 Mt | 1994 | 8.5234 Mt | 2013 | 7.4837 Mt |
| 1976 | 6.6137 Mt | 1995 | 8.8104 Mt | 2014 | 7.2146 Mt |
| 1977 | 7.2381 Mt | 1996 | 9.1895 Mt | 2015 | 7.1067 Mt |
| 1978 | 7.4071 Mt | 1997 | 9.4034 Mt | 2016 | 7.6254 Mt |
| 1979 | 7.1333 Mt | 1998 | 9.9026 Mt | 2017 | 7.3076 Mt |
| 1980 | 6.8786 Mt | 1999 | 10.16 Mt | 2018 | 8.6911 Mt |
| 1981 | 6.8042 Mt | 2000 | 10.24 Mt | 2019 | 8.4395 Mt |
| 1982 | 5.8004 Mt | 2001 | 10.31 Mt | 2020 | 5.9229 Mt |
| 1983 | 5.8703 Mt | 2002 | 10.26 Mt | 2021 | 6.4724 Mt |
| 1984 | 5.4732 Mt | 2003 | 10.56 Mt | 2022 | 7.5151 Mt |
| 1985 | 4.8742 Mt | 2004 | 10.6 Mt | 2023 | 7.7039 Mt |
| 1986 | 4.6569 Mt | 2005 | 10.63 Mt | 2024 | 8.074 Mt |
| 1987 | 4.8177 Mt | 2006 | 12.31 Mt | | |
| 1988 | 5.0577 Mt | 2007 | 12.24 Mt | | |
Show data table
| 1970 | 4.29 t | 1989 | 2.74 t | 2008 | 3.62 t |
| 1971 | 4.22 t | 1990 | 3.24 t | 2009 | 2.94 t |
| 1972 | 4.15 t | 1991 | 3.17 t | 2010 | 2.8 t |
| 1973 | 4.36 t | 1992 | 3.42 t | 2011 | 2.75 t |
| 1974 | 4.45 t | 1993 | 3.44 t | 2012 | 2.53 t |
| 1975 | 3.69 t | 1994 | 3.44 t | 2013 | 2.69 t |
| 1976 | 3.23 t | 1995 | 3.52 t | 2014 | 2.58 t |
| 1977 | 3.5 t | 1996 | 3.64 t | 2015 | 2.54 t |
| 1978 | 3.54 t | 1997 | 3.69 t | 2016 | 2.71 t |
| 1979 | 3.37 t | 1998 | 3.85 t | 2017 | 2.6 t |
| 1980 | 3.21 t | 1999 | 3.92 t | 2018 | 3.08 t |
| 1981 | 3.13 t | 2000 | 3.93 t | 2019 | 2.99 t |
| 1982 | 2.63 t | 2001 | 3.93 t | 2020 | 2.09 t |
| 1983 | 2.63 t | 2002 | 3.89 t | 2021 | 2.28 t |
| 1984 | 2.42 t | 2003 | 3.97 t | 2022 | 2.65 t |
| 1985 | 2.13 t | 2004 | 3.97 t | 2023 | 2.71 t |
| 1986 | 2.01 t | 2005 | 3.96 t | 2024 | 2.84 t |
| 1987 | 2.07 t | 2006 | 4.56 t | | |
| 1988 | 2.16 t | 2007 | 4.51 t | | |