Show data table
| 1970 | 0.0114 Mt | 1989 | 0.035 Mt | 2008 | 0.0989 Mt |
| 1971 | 0.0114 Mt | 1990 | 0.0509 Mt | 2009 | 0.1063 Mt |
| 1972 | 0.0138 Mt | 1991 | 0.0511 Mt | 2010 | 0.1188 Mt |
| 1973 | 0.0139 Mt | 1992 | 0.0529 Mt | 2011 | 0.0919 Mt |
| 1974 | 0.0124 Mt | 1993 | 0.0595 Mt | 2012 | 0.0951 Mt |
| 1975 | 0.0149 Mt | 1994 | 0.0695 Mt | 2013 | 0.1226 Mt |
| 1976 | 0.0136 Mt | 1995 | 0.0625 Mt | 2014 | 0.11 Mt |
| 1977 | 0.0149 Mt | 1996 | 0.0667 Mt | 2015 | 0.1171 Mt |
| 1978 | 0.0149 Mt | 1997 | 0.0909 Mt | 2016 | 0.1276 Mt |
| 1979 | 0.0148 Mt | 1998 | 0.0793 Mt | 2017 | 0.128 Mt |
| 1980 | 0.0146 Mt | 1999 | 0.0803 Mt | 2018 | 0.1435 Mt |
| 1981 | 0.019 Mt | 2000 | 0.0574 Mt | 2019 | 0.1804 Mt |
| 1982 | 0.0178 Mt | 2001 | 0.0583 Mt | 2020 | 0.1536 Mt |
| 1983 | 0.0174 Mt | 2002 | 0.0634 Mt | 2021 | 0.1608 Mt |
| 1984 | 0.0193 Mt | 2003 | 0.0696 Mt | 2022 | 0.1694 Mt |
| 1985 | 0.0194 Mt | 2004 | 0.0664 Mt | 2023 | 0.1699 Mt |
| 1986 | 0.0233 Mt | 2005 | 0.0713 Mt | 2024 | 0.1759 Mt |
| 1987 | 0.0307 Mt | 2006 | 0.0813 Mt | | |
| 1988 | 0.0341 Mt | 2007 | 0.0905 Mt | | |
Show data table
| 1970 | 0.12 t | 1989 | 0.35 t | 2008 | 0.89 t |
| 1971 | 0.12 t | 1990 | 0.51 t | 2009 | 0.96 t |
| 1972 | 0.14 t | 1991 | 0.51 t | 2010 | 1.06 t |
| 1973 | 0.14 t | 1992 | 0.52 t | 2011 | 0.82 t |
| 1974 | 0.13 t | 1993 | 0.58 t | 2012 | 0.84 t |
| 1975 | 0.15 t | 1994 | 0.67 t | 2013 | 1.08 t |
| 1976 | 0.14 t | 1995 | 0.6 t | 2014 | 0.96 t |
| 1977 | 0.15 t | 1996 | 0.64 t | 2015 | 1.02 t |
| 1978 | 0.15 t | 1997 | 0.86 t | 2016 | 1.11 t |
| 1979 | 0.15 t | 1998 | 0.75 t | 2017 | 1.11 t |
| 1980 | 0.15 t | 1999 | 0.75 t | 2018 | 1.24 t |
| 1981 | 0.2 t | 2000 | 0.53 t | 2019 | 1.56 t |
| 1982 | 0.19 t | 2001 | 0.54 t | 2020 | 1.32 t |
| 1983 | 0.18 t | 2002 | 0.58 t | 2021 | 1.38 t |
| 1984 | 0.2 t | 2003 | 0.64 t | 2022 | 1.45 t |
| 1985 | 0.2 t | 2004 | 0.61 t | 2023 | 1.45 t |
| 1986 | 0.24 t | 2005 | 0.65 t | 2024 | 1.5 t |
| 1987 | 0.31 t | 2006 | 0.74 t | | |
| 1988 | 0.35 t | 2007 | 0.82 t | | |