Show data table
| 1970 | 2.0244 Mt | 1989 | 3.9947 Mt | 2008 | 8.9078 Mt |
| 1971 | 1.8711 Mt | 1990 | 4.3001 Mt | 2009 | 8.0209 Mt |
| 1972 | 2.2028 Mt | 1991 | 4.9097 Mt | 2010 | 7.3795 Mt |
| 1973 | 2.6748 Mt | 1992 | 5.3615 Mt | 2011 | 7.8612 Mt |
| 1974 | 2.776 Mt | 1993 | 5.411 Mt | 2012 | 7.6224 Mt |
| 1975 | 2.8613 Mt | 1994 | 5.494 Mt | 2013 | 7.7892 Mt |
| 1976 | 3.3072 Mt | 1995 | 5.8139 Mt | 2014 | 8.1068 Mt |
| 1977 | 3.3855 Mt | 1996 | 6.1077 Mt | 2015 | 7.3653 Mt |
| 1978 | 3.4901 Mt | 1997 | 6.5013 Mt | 2016 | 7.8994 Mt |
| 1979 | 3.1637 Mt | 1998 | 5.7432 Mt | 2017 | 7.8716 Mt |
| 1980 | 3.9542 Mt | 1999 | 6.0084 Mt | 2018 | 8.0303 Mt |
| 1981 | 3.3218 Mt | 2000 | 6.0748 Mt | 2019 | 7.6035 Mt |
| 1982 | 3.6992 Mt | 2001 | 5.8618 Mt | 2020 | 10.13 Mt |
| 1983 | 4.031 Mt | 2002 | 5.5581 Mt | 2021 | 9.9862 Mt |
| 1984 | 3.904 Mt | 2003 | 6.4529 Mt | 2022 | 9.5371 Mt |
| 1985 | 3.8488 Mt | 2004 | 6.2692 Mt | 2023 | 9.7036 Mt |
| 1986 | 3.6238 Mt | 2005 | 6.0092 Mt | 2024 | 9.3667 Mt |
| 1987 | 3.7274 Mt | 2006 | 8.6155 Mt | | |
| 1988 | 4.0582 Mt | 2007 | 8.1844 Mt | | |
Show data table
| 1970 | 14.98 t | 1989 | 16.1 t | 2008 | 23.58 t |
| 1971 | 13.57 t | 1990 | 16.84 t | 2009 | 20.84 t |
| 1972 | 15.49 t | 1991 | 18.7 t | 2010 | 18.81 t |
| 1973 | 18.15 t | 1992 | 19.87 t | 2011 | 19.68 t |
| 1974 | 18.18 t | 1993 | 19.54 t | 2012 | 18.79 t |
| 1975 | 18.1 t | 1994 | 19.34 t | 2013 | 18.94 t |
| 1976 | 20.21 t | 1995 | 19.97 t | 2014 | 19.45 t |
| 1977 | 20 t | 1996 | 20.48 t | 2015 | 17.44 t |
| 1978 | 19.96 t | 1997 | 21.29 t | 2016 | 18.48 t |
| 1979 | 17.54 t | 1998 | 18.39 t | 2017 | 18.19 t |
| 1980 | 21.25 t | 1999 | 18.81 t | 2018 | 18.34 t |
| 1981 | 17.3 t | 2000 | 18.61 t | 2019 | 17.18 t |
| 1982 | 18.67 t | 2001 | 17.58 t | 2020 | 22.64 t |
| 1983 | 19.69 t | 2002 | 16.34 t | 2021 | 22.11 t |
| 1984 | 18.44 t | 2003 | 18.62 t | 2022 | 20.94 t |
| 1985 | 17.58 t | 2004 | 17.76 t | 2023 | 21.14 t |
| 1986 | 16 t | 2005 | 16.74 t | 2024 | 20.24 t |
| 1987 | 15.94 t | 2006 | 23.63 t | | |
| 1988 | 16.85 t | 2007 | 22.07 t | | |