Show data table
| 1970 | 9.6877 Mt | 1989 | 15.87 Mt | 2008 | 18.9 Mt |
| 1971 | 9.72 Mt | 1990 | 14.69 Mt | 2009 | 16.89 Mt |
| 1972 | 9.4634 Mt | 1991 | 13.74 Mt | 2010 | 17.16 Mt |
| 1973 | 10.79 Mt | 1992 | 13.27 Mt | 2011 | 16.08 Mt |
| 1974 | 11.64 Mt | 1993 | 13.98 Mt | 2012 | 15.52 Mt |
| 1975 | 11.53 Mt | 1994 | 14.08 Mt | 2013 | 15.51 Mt |
| 1976 | 11.04 Mt | 1995 | 14.97 Mt | 2014 | 14.13 Mt |
| 1977 | 12.06 Mt | 1996 | 15.72 Mt | 2015 | 14.29 Mt |
| 1978 | 12.83 Mt | 1997 | 16.21 Mt | 2016 | 15.02 Mt |
| 1979 | 13.47 Mt | 1998 | 16.03 Mt | 2017 | 15.34 Mt |
| 1980 | 13.81 Mt | 1999 | 15.47 Mt | 2018 | 15.45 Mt |
| 1981 | 11.13 Mt | 2000 | 15.09 Mt | 2019 | 14.83 Mt |
| 1982 | 11.15 Mt | 2001 | 16.97 Mt | 2020 | 13.54 Mt |
| 1983 | 13.87 Mt | 2002 | 17.28 Mt | 2021 | 13.86 Mt |
| 1984 | 13.87 Mt | 2003 | 17.12 Mt | 2022 | 13.39 Mt |
| 1985 | 13.51 Mt | 2004 | 17.4 Mt | 2023 | 12.62 Mt |
| 1986 | 13.42 Mt | 2005 | 17.64 Mt | 2024 | 13.33 Mt |
| 1987 | 12.77 Mt | 2006 | 17.94 Mt | | |
| 1988 | 17.07 Mt | 2007 | 17.94 Mt | | |
Show data table
| 1970 | 5.62 t | 1989 | 7.95 t | 2008 | 9.35 t |
| 1971 | 5.59 t | 1990 | 7.35 t | 2009 | 8.28 t |
| 1972 | 5.4 t | 1991 | 6.87 t | 2010 | 8.38 t |
| 1973 | 6.11 t | 1992 | 6.65 t | 2011 | 7.83 t |
| 1974 | 6.55 t | 1993 | 7.02 t | 2012 | 7.54 t |
| 1975 | 6.43 t | 1994 | 7.08 t | 2013 | 7.53 t |
| 1976 | 6.06 t | 1995 | 7.52 t | 2014 | 6.85 t |
| 1977 | 6.55 t | 1996 | 7.9 t | 2015 | 6.93 t |
| 1978 | 6.89 t | 1997 | 8.16 t | 2016 | 7.27 t |
| 1979 | 7.15 t | 1998 | 8.09 t | 2017 | 7.43 t |
| 1980 | 7.26 t | 1999 | 7.8 t | 2018 | 7.45 t |
| 1981 | 5.84 t | 2000 | 7.59 t | 2019 | 7.1 t |
| 1982 | 5.83 t | 2001 | 8.52 t | 2020 | 6.44 t |
| 1983 | 7.22 t | 2002 | 8.66 t | 2021 | 6.57 t |
| 1984 | 7.18 t | 2003 | 8.58 t | 2022 | 6.34 t |
| 1985 | 6.96 t | 2004 | 8.71 t | 2023 | 5.95 t |
| 1986 | 6.82 t | 2005 | 8.82 t | 2024 | 6.27 t |
| 1987 | 6.42 t | 2006 | 8.94 t | | |
| 1988 | 8.56 t | 2007 | 8.89 t | | |