Show data table
| 1970 | 1.6554 Mt | 1989 | 1.7165 Mt | 2008 | 4.6481 Mt |
| 1971 | 1.6628 Mt | 1990 | 1.9647 Mt | 2009 | 4.5454 Mt |
| 1972 | 1.7165 Mt | 1991 | 1.9754 Mt | 2010 | 4.6711 Mt |
| 1973 | 1.9014 Mt | 1992 | 2.2934 Mt | 2011 | 4.8816 Mt |
| 1974 | 2.0342 Mt | 1993 | 2.2505 Mt | 2012 | 4.8471 Mt |
| 1975 | 2.0184 Mt | 1994 | 2.5596 Mt | 2013 | 4.6389 Mt |
| 1976 | 2.3111 Mt | 1995 | 2.7192 Mt | 2014 | 4.9091 Mt |
| 1977 | 2.8258 Mt | 1996 | 2.8846 Mt | 2015 | 5.4971 Mt |
| 1978 | 2.5576 Mt | 1997 | 3.0885 Mt | 2016 | 5.7223 Mt |
| 1979 | 1.6834 Mt | 1998 | 3.5917 Mt | 2017 | 5.6825 Mt |
| 1980 | 1.97 Mt | 1999 | 3.623 Mt | 2018 | 5.1803 Mt |
| 1981 | 2.0782 Mt | 2000 | 3.7702 Mt | 2019 | 5.3239 Mt |
| 1982 | 2.0304 Mt | 2001 | 3.9936 Mt | 2020 | 4.7462 Mt |
| 1983 | 2.2016 Mt | 2002 | 4.1327 Mt | 2021 | 5.1925 Mt |
| 1984 | 1.9993 Mt | 2003 | 4.5272 Mt | 2022 | 5.2612 Mt |
| 1985 | 2.0172 Mt | 2004 | 4.6436 Mt | 2023 | 5.5369 Mt |
| 1986 | 2.3856 Mt | 2005 | 4.4103 Mt | 2024 | 5.7393 Mt |
| 1987 | 2.4124 Mt | 2006 | 4.6665 Mt | | |
| 1988 | 2.1568 Mt | 2007 | 4.8378 Mt | | |
Show data table
| 1970 | 0.68 t | 1989 | 0.42 t | 2008 | 0.83 t |
| 1971 | 0.67 t | 1990 | 0.47 t | 2009 | 0.8 t |
| 1972 | 0.67 t | 1991 | 0.46 t | 2010 | 0.81 t |
| 1973 | 0.72 t | 1992 | 0.53 t | 2011 | 0.84 t |
| 1974 | 0.74 t | 1993 | 0.51 t | 2012 | 0.82 t |
| 1975 | 0.72 t | 1994 | 0.56 t | 2013 | 0.78 t |
| 1976 | 0.8 t | 1995 | 0.59 t | 2014 | 0.81 t |
| 1977 | 0.94 t | 1996 | 0.61 t | 2015 | 0.89 t |
| 1978 | 0.83 t | 1997 | 0.64 t | 2016 | 0.92 t |
| 1979 | 0.53 t | 1998 | 0.74 t | 2017 | 0.9 t |
| 1980 | 0.61 t | 1999 | 0.73 t | 2018 | 0.81 t |
| 1981 | 0.62 t | 2000 | 0.75 t | 2019 | 0.82 t |
| 1982 | 0.59 t | 2001 | 0.78 t | 2020 | 0.72 t |
| 1983 | 0.62 t | 2002 | 0.8 t | 2021 | 0.78 t |
| 1984 | 0.55 t | 2003 | 0.87 t | 2022 | 0.78 t |
| 1985 | 0.54 t | 2004 | 0.88 t | 2023 | 0.81 t |
| 1986 | 0.63 t | 2005 | 0.83 t | 2024 | 0.83 t |
| 1987 | 0.62 t | 2006 | 0.86 t | | |
| 1988 | 0.54 t | 2007 | 0.88 t | | |