Show data table
| 1970 | 28.85 Mt | 1989 | 79.52 Mt | 2008 | 91.58 Mt |
| 1971 | 42.63 Mt | 1990 | 75.11 Mt | 2009 | 80.92 Mt |
| 1972 | 55.25 Mt | 1991 | 81.35 Mt | 2010 | 94.4 Mt |
| 1973 | 66.44 Mt | 1992 | 89.11 Mt | 2011 | 104.02 Mt |
| 1974 | 84 Mt | 1993 | 86.65 Mt | 2012 | 102.26 Mt |
| 1975 | 64.01 Mt | 1994 | 80.9 Mt | 2013 | 114.61 Mt |
| 1976 | 75.2 Mt | 1995 | 88.85 Mt | 2014 | 122.73 Mt |
| 1977 | 66.47 Mt | 1996 | 103.63 Mt | 2015 | 118.45 Mt |
| 1978 | 69.54 Mt | 1997 | 100.82 Mt | 2016 | 123.48 Mt |
| 1979 | 99.42 Mt | 1998 | 91.35 Mt | 2017 | 116.04 Mt |
| 1980 | 89.6 Mt | 1999 | 89.99 Mt | 2018 | 121.41 Mt |
| 1981 | 73.31 Mt | 2000 | 100.19 Mt | 2019 | 126.11 Mt |
| 1982 | 69.9 Mt | 2001 | 106.34 Mt | 2020 | 118.92 Mt |
| 1983 | 69.99 Mt | 2002 | 96.22 Mt | 2021 | 130.9 Mt |
| 1984 | 70.3 Mt | 2003 | 107.62 Mt | 2022 | 129.04 Mt |
| 1985 | 73.22 Mt | 2004 | 103.95 Mt | 2023 | 125.87 Mt |
| 1986 | 71.55 Mt | 2005 | 102.97 Mt | 2024 | 131.91 Mt |
| 1987 | 67.74 Mt | 2006 | 92.72 Mt | | |
| 1988 | 77.02 Mt | 2007 | 84.38 Mt | | |
Show data table
| 1970 | 0.52 t | 1989 | 0.84 t | 2008 | 0.58 t |
| 1971 | 0.75 t | 1990 | 0.77 t | 2009 | 0.5 t |
| 1972 | 0.94 t | 1991 | 0.82 t | 2010 | 0.57 t |
| 1973 | 1.11 t | 1992 | 0.87 t | 2011 | 0.61 t |
| 1974 | 1.36 t | 1993 | 0.82 t | 2012 | 0.58 t |
| 1975 | 1.01 t | 1994 | 0.75 t | 2013 | 0.63 t |
| 1976 | 1.15 t | 1995 | 0.8 t | 2014 | 0.66 t |
| 1977 | 0.99 t | 1996 | 0.91 t | 2015 | 0.62 t |
| 1978 | 1 t | 1997 | 0.86 t | 2016 | 0.63 t |
| 1979 | 1.39 t | 1998 | 0.76 t | 2017 | 0.58 t |
| 1980 | 1.21 t | 1999 | 0.73 t | 2018 | 0.59 t |
| 1981 | 0.96 t | 2000 | 0.79 t | 2019 | 0.6 t |
| 1982 | 0.89 t | 2001 | 0.82 t | 2020 | 0.56 t |
| 1983 | 0.87 t | 2002 | 0.72 t | 2021 | 0.6 t |
| 1984 | 0.85 t | 2003 | 0.78 t | 2022 | 0.58 t |
| 1985 | 0.86 t | 2004 | 0.74 t | 2023 | 0.55 t |
| 1986 | 0.82 t | 2005 | 0.71 t | 2024 | 0.57 t |
| 1987 | 0.76 t | 2006 | 0.62 t | | |
| 1988 | 0.84 t | 2007 | 0.55 t | | |