Show data table
| 1970 | 0.0114 Mt | 1989 | 0.0287 Mt | 2008 | 0.0815 Mt |
| 1971 | 0.0114 Mt | 1990 | 0.0294 Mt | 2009 | 0.1241 Mt |
| 1972 | 0.0138 Mt | 1991 | 0.0282 Mt | 2010 | 0.097 Mt |
| 1973 | 0.014 Mt | 1992 | 0.0342 Mt | 2011 | 0.069 Mt |
| 1974 | 0.0125 Mt | 1993 | 0.0278 Mt | 2012 | 0.0876 Mt |
| 1975 | 0.015 Mt | 1994 | 0.0509 Mt | 2013 | 0.0825 Mt |
| 1976 | 0.0137 Mt | 1995 | 0.0556 Mt | 2014 | 0.0922 Mt |
| 1977 | 0.015 Mt | 1996 | 0.0496 Mt | 2015 | 0.0951 Mt |
| 1978 | 0.0151 Mt | 1997 | 0.0598 Mt | 2016 | 0.1012 Mt |
| 1979 | 0.0149 Mt | 1998 | 0.0668 Mt | 2017 | 0.1091 Mt |
| 1980 | 0.0147 Mt | 1999 | 0.0676 Mt | 2018 | 0.1102 Mt |
| 1981 | 0.0145 Mt | 2000 | 0.0419 Mt | 2019 | 0.1165 Mt |
| 1982 | 0.0136 Mt | 2001 | 0.0485 Mt | 2020 | 0.1238 Mt |
| 1983 | 0.0133 Mt | 2002 | 0.0556 Mt | 2021 | 0.1174 Mt |
| 1984 | 0.0148 Mt | 2003 | 0.0601 Mt | 2022 | 0.1271 Mt |
| 1985 | 0.0148 Mt | 2004 | 0.0643 Mt | 2023 | 0.1275 Mt |
| 1986 | 0.0131 Mt | 2005 | 0.0663 Mt | 2024 | 0.132 Mt |
| 1987 | 0.0139 Mt | 2006 | 0.0731 Mt | | |
| 1988 | 0.0175 Mt | 2007 | 0.0782 Mt | | |
Show data table
| 1970 | 0.12 t | 1989 | 0.26 t | 2008 | 0.73 t |
| 1971 | 0.12 t | 1990 | 0.26 t | 2009 | 1.12 t |
| 1972 | 0.14 t | 1991 | 0.25 t | 2010 | 0.88 t |
| 1973 | 0.14 t | 1992 | 0.3 t | 2011 | 0.63 t |
| 1974 | 0.13 t | 1993 | 0.25 t | 2012 | 0.81 t |
| 1975 | 0.15 t | 1994 | 0.45 t | 2013 | 0.76 t |
| 1976 | 0.14 t | 1995 | 0.49 t | 2014 | 0.86 t |
| 1977 | 0.15 t | 1996 | 0.44 t | 2015 | 0.89 t |
| 1978 | 0.15 t | 1997 | 0.53 t | 2016 | 0.95 t |
| 1979 | 0.14 t | 1998 | 0.59 t | 2017 | 1.03 t |
| 1980 | 0.14 t | 1999 | 0.6 t | 2018 | 1.05 t |
| 1981 | 0.14 t | 2000 | 0.37 t | 2019 | 1.12 t |
| 1982 | 0.13 t | 2001 | 0.43 t | 2020 | 1.2 t |
| 1983 | 0.12 t | 2002 | 0.49 t | 2021 | 1.14 t |
| 1984 | 0.14 t | 2003 | 0.53 t | 2022 | 1.25 t |
| 1985 | 0.14 t | 2004 | 0.57 t | 2023 | 1.26 t |
| 1986 | 0.12 t | 2005 | 0.59 t | 2024 | 1.31 t |
| 1987 | 0.13 t | 2006 | 0.65 t | | |
| 1988 | 0.16 t | 2007 | 0.7 t | | |