Show data table
| 1970 | 3.121 Mt | 1989 | 4.1764 Mt | 2008 | 13.3 Mt |
| 1971 | 3.1512 Mt | 1990 | 4.239 Mt | 2009 | 12.78 Mt |
| 1972 | 3.7834 Mt | 1991 | 4.4253 Mt | 2010 | 13.52 Mt |
| 1973 | 3.9462 Mt | 1992 | 5.5124 Mt | 2011 | 15.91 Mt |
| 1974 | 3.3978 Mt | 1993 | 5.3962 Mt | 2012 | 17.89 Mt |
| 1975 | 2.9874 Mt | 1994 | 6.2233 Mt | 2013 | 14.84 Mt |
| 1976 | 3.0545 Mt | 1995 | 6.2434 Mt | 2014 | 17.88 Mt |
| 1977 | 3.2965 Mt | 1996 | 8.8106 Mt | 2015 | 19.71 Mt |
| 1978 | 3.8939 Mt | 1997 | 8.7878 Mt | 2016 | 23.49 Mt |
| 1979 | 4.2106 Mt | 1998 | 9.0747 Mt | 2017 | 23.41 Mt |
| 1980 | 4.2083 Mt | 1999 | 10.03 Mt | 2018 | 21.98 Mt |
| 1981 | 4.3366 Mt | 2000 | 11.47 Mt | 2019 | 23.97 Mt |
| 1982 | 4.9369 Mt | 2001 | 11.37 Mt | 2020 | 22.61 Mt |
| 1983 | 5.0394 Mt | 2002 | 11.9 Mt | 2021 | 22.82 Mt |
| 1984 | 4.4195 Mt | 2003 | 12.86 Mt | 2022 | 20.8 Mt |
| 1985 | 4.0204 Mt | 2004 | 13.28 Mt | 2023 | 21.58 Mt |
| 1986 | 3.9777 Mt | 2005 | 14.43 Mt | 2024 | 23.33 Mt |
| 1987 | 4.5597 Mt | 2006 | 13.19 Mt | | |
| 1988 | 4.3909 Mt | 2007 | 14.12 Mt | | |
Show data table
| 1970 | 0.25 t | 1989 | 0.26 t | 2008 | 0.64 t |
| 1971 | 0.25 t | 1990 | 0.26 t | 2009 | 0.62 t |
| 1972 | 0.3 t | 1991 | 0.27 t | 2010 | 0.65 t |
| 1973 | 0.3 t | 1992 | 0.33 t | 2011 | 0.76 t |
| 1974 | 0.26 t | 1993 | 0.32 t | 2012 | 0.85 t |
| 1975 | 0.22 t | 1994 | 0.36 t | 2013 | 0.72 t |
| 1976 | 0.22 t | 1995 | 0.36 t | 2014 | 0.86 t |
| 1977 | 0.23 t | 1996 | 0.49 t | 2015 | 0.94 t |
| 1978 | 0.27 t | 1997 | 0.48 t | 2016 | 1.11 t |
| 1979 | 0.29 t | 1998 | 0.49 t | 2017 | 1.09 t |
| 1980 | 0.28 t | 1999 | 0.53 t | 2018 | 1.01 t |
| 1981 | 0.29 t | 2000 | 0.59 t | 2019 | 1.1 t |
| 1982 | 0.32 t | 2001 | 0.58 t | 2020 | 1.03 t |
| 1983 | 0.33 t | 2002 | 0.6 t | 2021 | 1.03 t |
| 1984 | 0.29 t | 2003 | 0.64 t | 2022 | 0.94 t |
| 1985 | 0.26 t | 2004 | 0.66 t | 2023 | 0.98 t |
| 1986 | 0.25 t | 2005 | 0.71 t | 2024 | 1.06 t |
| 1987 | 0.29 t | 2006 | 0.65 t | | |
| 1988 | 0.27 t | 2007 | 0.69 t | | |