Show data table
| 1970 | 28.94 Mt | 1989 | 76.43 Mt | 2008 | 101.84 Mt |
| 1971 | 29.99 Mt | 1990 | 77.91 Mt | 2009 | 96.22 Mt |
| 1972 | 36.82 Mt | 1991 | 77.94 Mt | 2010 | 89.1 Mt |
| 1973 | 39.38 Mt | 1992 | 80.07 Mt | 2011 | 86.14 Mt |
| 1974 | 38.6 Mt | 1993 | 79.59 Mt | 2012 | 81.56 Mt |
| 1975 | 40.6 Mt | 1994 | 81.21 Mt | 2013 | 73.88 Mt |
| 1976 | 45.55 Mt | 1995 | 84.26 Mt | 2014 | 71.01 Mt |
| 1977 | 47.77 Mt | 1996 | 84.25 Mt | 2015 | 69.45 Mt |
| 1978 | 50.39 Mt | 1997 | 85.2 Mt | 2016 | 68.16 Mt |
| 1979 | 53.3 Mt | 1998 | 88.66 Mt | 2017 | 68.38 Mt |
| 1980 | 53.41 Mt | 1999 | 88.9 Mt | 2018 | 66.54 Mt |
| 1981 | 53.1 Mt | 2000 | 96.07 Mt | 2019 | 61.49 Mt |
| 1982 | 54.23 Mt | 2001 | 98.12 Mt | 2020 | 52.36 Mt |
| 1983 | 57.72 Mt | 2002 | 98.09 Mt | 2021 | 53.72 Mt |
| 1984 | 59.04 Mt | 2003 | 101.85 Mt | 2022 | 55.12 Mt |
| 1985 | 62.45 Mt | 2004 | 101.59 Mt | 2023 | 51.24 Mt |
| 1986 | 62.05 Mt | 2005 | 103.64 Mt | 2024 | 52.51 Mt |
| 1987 | 67.24 Mt | 2006 | 102.39 Mt | | |
| 1988 | 71.74 Mt | 2007 | 106.01 Mt | | |
Show data table
| 1970 | 3.29 t | 1989 | 7.57 t | 2008 | 9.19 t |
| 1971 | 3.4 t | 1990 | 7.64 t | 2009 | 8.66 t |
| 1972 | 4.14 t | 1991 | 7.55 t | 2010 | 8.01 t |
| 1973 | 4.41 t | 1992 | 7.7 t | 2011 | 7.76 t |
| 1974 | 4.31 t | 1993 | 7.61 t | 2012 | 7.38 t |
| 1975 | 4.49 t | 1994 | 7.73 t | 2013 | 6.74 t |
| 1976 | 4.96 t | 1995 | 7.98 t | 2014 | 6.52 t |
| 1977 | 5.13 t | 1996 | 7.94 t | 2015 | 6.42 t |
| 1978 | 5.34 t | 1997 | 7.99 t | 2016 | 6.33 t |
| 1979 | 5.58 t | 1998 | 8.27 t | 2017 | 6.36 t |
| 1980 | 5.54 t | 1999 | 8.26 t | 2018 | 6.2 t |
| 1981 | 5.46 t | 2000 | 8.89 t | 2019 | 5.74 t |
| 1982 | 5.54 t | 2001 | 9.03 t | 2020 | 4.89 t |
| 1983 | 5.86 t | 2002 | 9 t | 2021 | 5.08 t |
| 1984 | 5.97 t | 2003 | 9.32 t | 2022 | 5.28 t |
| 1985 | 6.29 t | 2004 | 9.27 t | 2023 | 4.92 t |
| 1986 | 6.23 t | 2005 | 9.43 t | 2024 | 5.05 t |
| 1987 | 6.72 t | 2006 | 9.29 t | | |
| 1988 | 7.15 t | 2007 | 9.59 t | | |