Show data table
| 1970 | 0.0189 Mt | 1989 | 0.086 Mt | 2008 | 0.1237 Mt |
| 1971 | 0.0189 Mt | 1990 | 0.0891 Mt | 2009 | 0.1308 Mt |
| 1972 | 0.0202 Mt | 1991 | 0.0944 Mt | 2010 | 0.1262 Mt |
| 1973 | 0.0242 Mt | 1992 | 0.0992 Mt | 2011 | 0.12 Mt |
| 1974 | 0.0297 Mt | 1993 | 0.1003 Mt | 2012 | 0.1182 Mt |
| 1975 | 0.0246 Mt | 1994 | 0.1397 Mt | 2013 | 0.1194 Mt |
| 1976 | 0.0242 Mt | 1995 | 0.1152 Mt | 2014 | 0.1318 Mt |
| 1977 | 0.0255 Mt | 1996 | 0.1309 Mt | 2015 | 0.1347 Mt |
| 1978 | 0.0253 Mt | 1997 | 0.1414 Mt | 2016 | 0.1432 Mt |
| 1979 | 0.0272 Mt | 1998 | 0.1479 Mt | 2017 | 0.1549 Mt |
| 1980 | 0.0293 Mt | 1999 | 0.1476 Mt | 2018 | 0.1474 Mt |
| 1981 | 0.0434 Mt | 2000 | 0.0998 Mt | 2019 | 0.1655 Mt |
| 1982 | 0.0427 Mt | 2001 | 0.0947 Mt | 2020 | 0.1865 Mt |
| 1983 | 0.0422 Mt | 2002 | 0.1046 Mt | 2021 | 0.2065 Mt |
| 1984 | 0.0377 Mt | 2003 | 0.1255 Mt | 2022 | 0.1614 Mt |
| 1985 | 0.0416 Mt | 2004 | 0.1118 Mt | 2023 | 0.1618 Mt |
| 1986 | 0.0224 Mt | 2005 | 0.1212 Mt | 2024 | 0.1698 Mt |
| 1987 | 0.0573 Mt | 2006 | 0.1331 Mt | | |
| 1988 | 0.0727 Mt | 2007 | 0.1142 Mt | | |
Show data table
| 1970 | 0.22 t | 1989 | 0.87 t | 2008 | 1.16 t |
| 1971 | 0.22 t | 1990 | 0.89 t | 2009 | 1.22 t |
| 1972 | 0.23 t | 1991 | 0.94 t | 2010 | 1.18 t |
| 1973 | 0.27 t | 1992 | 0.99 t | 2011 | 1.12 t |
| 1974 | 0.33 t | 1993 | 1 t | 2012 | 1.1 t |
| 1975 | 0.26 t | 1994 | 1.39 t | 2013 | 1.12 t |
| 1976 | 0.25 t | 1995 | 1.15 t | 2014 | 1.24 t |
| 1977 | 0.26 t | 1996 | 1.31 t | 2015 | 1.27 t |
| 1978 | 0.26 t | 1997 | 1.4 t | 2016 | 1.36 t |
| 1979 | 0.28 t | 1998 | 1.46 t | 2017 | 1.47 t |
| 1980 | 0.3 t | 1999 | 1.45 t | 2018 | 1.4 t |
| 1981 | 0.44 t | 2000 | 0.97 t | 2019 | 1.57 t |
| 1982 | 0.44 t | 2001 | 0.92 t | 2020 | 1.76 t |
| 1983 | 0.43 t | 2002 | 1.01 t | 2021 | 1.96 t |
| 1984 | 0.38 t | 2003 | 1.2 t | 2022 | 1.54 t |
| 1985 | 0.42 t | 2004 | 1.06 t | 2023 | 1.55 t |
| 1986 | 0.23 t | 2005 | 1.15 t | 2024 | 1.63 t |
| 1987 | 0.58 t | 2006 | 1.25 t | | |
| 1988 | 0.73 t | 2007 | 1.07 t | | |