Show data table
| 1970 | 60.16 Mt | 1989 | 97.52 Mt | 2008 | 64.77 Mt |
| 1971 | 60.26 Mt | 1990 | 105.53 Mt | 2009 | 61.61 Mt |
| 1972 | 64.37 Mt | 1991 | 101.59 Mt | 2010 | 66.12 Mt |
| 1973 | 70.35 Mt | 1992 | 91.84 Mt | 2011 | 62.96 Mt |
| 1974 | 76.15 Mt | 1993 | 79.29 Mt | 2012 | 64.27 Mt |
| 1975 | 81.83 Mt | 1994 | 67.59 Mt | 2013 | 64.43 Mt |
| 1976 | 85.36 Mt | 1995 | 60.43 Mt | 2014 | 63.97 Mt |
| 1977 | 88.28 Mt | 1996 | 61.36 Mt | 2015 | 59.17 Mt |
| 1978 | 91.88 Mt | 1997 | 61.81 Mt | 2016 | 59.06 Mt |
| 1979 | 95.08 Mt | 1998 | 60.31 Mt | 2017 | 60.22 Mt |
| 1980 | 98.64 Mt | 1999 | 58.16 Mt | 2018 | 63.45 Mt |
| 1981 | 100.53 Mt | 2000 | 56.26 Mt | 2019 | 61.25 Mt |
| 1982 | 101.47 Mt | 2001 | 55 Mt | 2020 | 58.16 Mt |
| 1983 | 102.01 Mt | 2002 | 55.19 Mt | 2021 | 58.64 Mt |
| 1984 | 101.54 Mt | 2003 | 55.83 Mt | 2022 | 55.89 Mt |
| 1985 | 101.54 Mt | 2004 | 59.19 Mt | 2023 | 53.82 Mt |
| 1986 | 101.99 Mt | 2005 | 60.02 Mt | 2024 | 54.22 Mt |
| 1987 | 102.59 Mt | 2006 | 62.46 Mt | | |
| 1988 | 101 Mt | 2007 | 61.06 Mt | | |
Show data table
| 1970 | 6.66 t | 1989 | 9.59 t | 2008 | 6.8 t |
| 1971 | 6.61 t | 1990 | 10.36 t | 2009 | 6.48 t |
| 1972 | 7.01 t | 1991 | 9.97 t | 2010 | 6.97 t |
| 1973 | 7.6 t | 1992 | 8.99 t | 2011 | 6.65 t |
| 1974 | 8.17 t | 1993 | 7.74 t | 2012 | 6.8 t |
| 1975 | 8.74 t | 1994 | 6.61 t | 2013 | 6.82 t |
| 1976 | 9.07 t | 1995 | 5.93 t | 2014 | 6.77 t |
| 1977 | 9.33 t | 1996 | 6.04 t | 2015 | 6.25 t |
| 1978 | 9.65 t | 1997 | 6.11 t | 2016 | 6.24 t |
| 1979 | 9.92 t | 1998 | 5.99 t | 2017 | 6.37 t |
| 1980 | 10.23 t | 1999 | 5.8 t | 2018 | 6.72 t |
| 1981 | 10.35 t | 2000 | 5.64 t | 2019 | 6.5 t |
| 1982 | 10.38 t | 2001 | 5.54 t | 2020 | 6.2 t |
| 1983 | 10.36 t | 2002 | 5.59 t | 2021 | 6.3 t |
| 1984 | 10.25 t | 2003 | 5.7 t | 2022 | 6.06 t |
| 1985 | 10.18 t | 2004 | 6.08 t | 2023 | 5.86 t |
| 1986 | 10.16 t | 2005 | 6.21 t | 2024 | 5.94 t |
| 1987 | 10.15 t | 2006 | 6.5 t | | |
| 1988 | 9.96 t | 2007 | 6.39 t | | |