Show data table
| 1970 | 1,084 Mt | 1989 | 1,050 Mt | 2008 | 829.91 Mt |
| 1971 | 1,077 Mt | 1990 | 1,013 Mt | 2009 | 768.13 Mt |
| 1972 | 1,105 Mt | 1991 | 991.72 Mt | 2010 | 814.96 Mt |
| 1973 | 1,157 Mt | 1992 | 937.79 Mt | 2011 | 788.12 Mt |
| 1974 | 1,122 Mt | 1993 | 929.33 Mt | 2012 | 800.03 Mt |
| 1975 | 1,060 Mt | 1994 | 915.25 Mt | 2013 | 817.82 Mt |
| 1976 | 1,123 Mt | 1995 | 910.47 Mt | 2014 | 778.75 Mt |
| 1977 | 1,101 Mt | 1996 | 939.35 Mt | 2015 | 784.91 Mt |
| 1978 | 1,139 Mt | 1997 | 907.48 Mt | 2016 | 789.25 Mt |
| 1979 | 1,189 Mt | 1998 | 906.61 Mt | 2017 | 774.48 Mt |
| 1980 | 1,135 Mt | 1999 | 870.66 Mt | 2018 | 746.7 Mt |
| 1981 | 1,100 Mt | 2000 | 871.38 Mt | 2019 | 696.5 Mt |
| 1982 | 1,054 Mt | 2001 | 885.47 Mt | 2020 | 642.09 Mt |
| 1983 | 1,069 Mt | 2002 | 869.94 Mt | 2021 | 670.67 Mt |
| 1984 | 1,085 Mt | 2003 | 877.91 Mt | 2022 | 658.09 Mt |
| 1985 | 1,086 Mt | 2004 | 863.39 Mt | 2023 | 589.66 Mt |
| 1986 | 1,080 Mt | 2005 | 841.75 Mt | 2024 | 579.94 Mt |
| 1987 | 1,072 Mt | 2006 | 855.45 Mt | | |
| 1988 | 1,066 Mt | 2007 | 826.6 Mt | | |
Show data table
| 1970 | 13.87 t | 1989 | 13.34 t | 2008 | 10.11 t |
| 1971 | 13.75 t | 1990 | 12.75 t | 2009 | 9.38 t |
| 1972 | 14.04 t | 1991 | 12.39 t | 2010 | 9.97 t |
| 1973 | 14.66 t | 1992 | 11.63 t | 2011 | 9.82 t |
| 1974 | 14.21 t | 1993 | 11.45 t | 2012 | 9.95 t |
| 1975 | 13.48 t | 1994 | 11.24 t | 2013 | 10.14 t |
| 1976 | 14.33 t | 1995 | 11.15 t | 2014 | 9.62 t |
| 1977 | 14.09 t | 1996 | 11.47 t | 2015 | 9.61 t |
| 1978 | 14.58 t | 1997 | 11.06 t | 2016 | 9.58 t |
| 1979 | 15.22 t | 1998 | 11.05 t | 2017 | 9.37 t |
| 1980 | 14.5 t | 1999 | 10.6 t | 2018 | 9.01 t |
| 1981 | 14.02 t | 2000 | 10.6 t | 2019 | 8.38 t |
| 1982 | 13.45 t | 2001 | 10.75 t | 2020 | 7.72 t |
| 1983 | 13.69 t | 2002 | 10.55 t | 2021 | 8.06 t |
| 1984 | 13.94 t | 2003 | 10.64 t | 2022 | 7.91 t |
| 1985 | 13.98 t | 2004 | 10.46 t | 2023 | 7.08 t |
| 1986 | 13.89 t | 2005 | 10.21 t | 2024 | 6.94 t |
| 1987 | 13.77 t | 2006 | 10.38 t | | |
| 1988 | 13.64 t | 2007 | 10.05 t | | |