Show data table
| 1970 | 36.38 Mt | 1989 | 36.07 Mt | 2008 | 47.1 Mt |
| 1971 | 35.1 Mt | 1990 | 36.31 Mt | 2009 | 45.12 Mt |
| 1972 | 38.09 Mt | 1991 | 33.82 Mt | 2010 | 47.98 Mt |
| 1973 | 38.67 Mt | 1992 | 36.36 Mt | 2011 | 46.94 Mt |
| 1974 | 37.09 Mt | 1993 | 38.5 Mt | 2012 | 46.39 Mt |
| 1975 | 36.38 Mt | 1994 | 40.48 Mt | 2013 | 46.88 Mt |
| 1976 | 38.51 Mt | 1995 | 40.65 Mt | 2014 | 46.99 Mt |
| 1977 | 39.48 Mt | 1996 | 40.94 Mt | 2015 | 47.95 Mt |
| 1978 | 38.45 Mt | 1997 | 43.3 Mt | 2016 | 47.37 Mt |
| 1979 | 41.23 Mt | 1998 | 45.1 Mt | 2017 | 47.41 Mt |
| 1980 | 39.54 Mt | 1999 | 46.72 Mt | 2018 | 46.64 Mt |
| 1981 | 36.09 Mt | 2000 | 41.77 Mt | 2019 | 45.35 Mt |
| 1982 | 32.67 Mt | 2001 | 42.28 Mt | 2020 | 43.71 Mt |
| 1983 | 32.55 Mt | 2002 | 41.58 Mt | 2021 | 44.43 Mt |
| 1984 | 34.52 Mt | 2003 | 44.45 Mt | 2022 | 43.55 Mt |
| 1985 | 34.98 Mt | 2004 | 44.89 Mt | 2023 | 41.6 Mt |
| 1986 | 37.37 Mt | 2005 | 43.31 Mt | 2024 | 40 Mt |
| 1987 | 36.05 Mt | 2006 | 44.01 Mt | | |
| 1988 | 37.07 Mt | 2007 | 44.91 Mt | | |
Show data table
| 1970 | 9.39 t | 1989 | 8.53 t | 2008 | 9.88 t |
| 1971 | 8.99 t | 1990 | 8.56 t | 2009 | 9.35 t |
| 1972 | 9.69 t | 1991 | 7.94 t | 2010 | 9.81 t |
| 1973 | 9.76 t | 1992 | 8.48 t | 2011 | 9.48 t |
| 1974 | 9.31 t | 1993 | 8.93 t | 2012 | 9.24 t |
| 1975 | 9.08 t | 1994 | 9.34 t | 2013 | 9.23 t |
| 1976 | 9.57 t | 1995 | 9.32 t | 2014 | 9.15 t |
| 1977 | 9.77 t | 1996 | 9.34 t | 2015 | 9.24 t |
| 1978 | 9.47 t | 1997 | 9.83 t | 2016 | 9.05 t |
| 1979 | 10.12 t | 1998 | 10.18 t | 2017 | 8.98 t |
| 1980 | 9.68 t | 1999 | 10.47 t | 2018 | 8.78 t |
| 1981 | 8.8 t | 2000 | 9.3 t | 2019 | 8.48 t |
| 1982 | 7.94 t | 2001 | 9.37 t | 2020 | 8.12 t |
| 1983 | 7.88 t | 2002 | 9.16 t | 2021 | 8.21 t |
| 1984 | 8.34 t | 2003 | 9.74 t | 2022 | 7.98 t |
| 1985 | 8.42 t | 2004 | 9.78 t | 2023 | 7.54 t |
| 1986 | 8.97 t | 2005 | 9.37 t | 2024 | 7.18 t |
| 1987 | 8.61 t | 2006 | 9.44 t | | |
| 1988 | 8.81 t | 2007 | 9.54 t | | |