Show data table
| 1970 | 8.0008 Mt | 1989 | 23.52 Mt | 2008 | 42.92 Mt |
| 1971 | 8.0238 Mt | 1990 | 31.65 Mt | 2009 | 43.76 Mt |
| 1972 | 9.3815 Mt | 1991 | 33.48 Mt | 2010 | 48.89 Mt |
| 1973 | 10.27 Mt | 1992 | 34.19 Mt | 2011 | 51.34 Mt |
| 1974 | 10.72 Mt | 1993 | 39.47 Mt | 2012 | 50.15 Mt |
| 1975 | 10.75 Mt | 1994 | 41.64 Mt | 2013 | 52.63 Mt |
| 1976 | 11.57 Mt | 1995 | 41.34 Mt | 2014 | 53.86 Mt |
| 1977 | 12.67 Mt | 1996 | 42.52 Mt | 2015 | 55.17 Mt |
| 1978 | 14.22 Mt | 1997 | 42.19 Mt | 2016 | 52.97 Mt |
| 1979 | 15.19 Mt | 1998 | 41.06 Mt | 2017 | 56.89 Mt |
| 1980 | 15.24 Mt | 1999 | 41.41 Mt | 2018 | 54.21 Mt |
| 1981 | 16.37 Mt | 2000 | 45.52 Mt | 2019 | 55.89 Mt |
| 1982 | 17.03 Mt | 2001 | 45.91 Mt | 2020 | 53.88 Mt |
| 1983 | 18.35 Mt | 2002 | 45.22 Mt | 2021 | 55.72 Mt |
| 1984 | 18.21 Mt | 2003 | 42.44 Mt | 2022 | 56.35 Mt |
| 1985 | 19.01 Mt | 2004 | 44.52 Mt | 2023 | 56.1 Mt |
| 1986 | 19.36 Mt | 2005 | 41.73 Mt | 2024 | 58.87 Mt |
| 1987 | 19.75 Mt | 2006 | 41.97 Mt | | |
| 1988 | 22.21 Mt | 2007 | 43.36 Mt | | |
Show data table
| 1970 | 3.86 t | 1989 | 8.02 t | 2008 | 8.87 t |
| 1971 | 3.8 t | 1990 | 10.39 t | 2009 | 8.77 t |
| 1972 | 4.36 t | 1991 | 10.68 t | 2010 | 9.63 t |
| 1973 | 4.69 t | 1992 | 10.58 t | 2011 | 9.9 t |
| 1974 | 4.81 t | 1993 | 11.91 t | 2012 | 9.44 t |
| 1975 | 4.75 t | 1994 | 12.18 t | 2013 | 9.75 t |
| 1976 | 5.04 t | 1995 | 11.73 t | 2014 | 9.85 t |
| 1977 | 5.45 t | 1996 | 11.58 t | 2015 | 9.97 t |
| 1978 | 6.04 t | 1997 | 11.11 t | 2016 | 9.45 t |
| 1979 | 6.37 t | 1998 | 10.46 t | 2017 | 10.14 t |
| 1980 | 6.31 t | 1999 | 10.46 t | 2018 | 9.61 t |
| 1981 | 6.46 t | 2000 | 11.3 t | 2019 | 9.8 t |
| 1982 | 6.43 t | 2001 | 11.09 t | 2020 | 9.48 t |
| 1983 | 6.84 t | 2002 | 10.83 t | 2021 | 10.22 t |
| 1984 | 6.67 t | 2003 | 10.31 t | 2022 | 10 t |
| 1985 | 6.95 t | 2004 | 10.69 t | 2023 | 9.48 t |
| 1986 | 7.08 t | 2005 | 9.78 t | 2024 | 9.75 t |
| 1987 | 7.12 t | 2006 | 9.54 t | | |
| 1988 | 7.8 t | 2007 | 9.45 t | | |