Show data table
| 1970 | 0.0258 Mt | 1989 | 0.1108 Mt | 2008 | 0.2229 Mt |
| 1971 | 0.0276 Mt | 1990 | 0.1157 Mt | 2009 | 0.2276 Mt |
| 1972 | 0.0358 Mt | 1991 | 0.1144 Mt | 2010 | 0.2472 Mt |
| 1973 | 0.0383 Mt | 1992 | 0.117 Mt | 2011 | 0.1996 Mt |
| 1974 | 0.0362 Mt | 1993 | 0.1085 Mt | 2012 | 0.191 Mt |
| 1975 | 0.0462 Mt | 1994 | 0.1275 Mt | 2013 | 0.2167 Mt |
| 1976 | 0.0441 Mt | 1995 | 0.1336 Mt | 2014 | 0.2321 Mt |
| 1977 | 0.0511 Mt | 1996 | 0.1326 Mt | 2015 | 0.2509 Mt |
| 1978 | 0.0536 Mt | 1997 | 0.1361 Mt | 2016 | 0.2632 Mt |
| 1979 | 0.0554 Mt | 1998 | 0.1394 Mt | 2017 | 0.281 Mt |
| 1980 | 0.0572 Mt | 1999 | 0.1412 Mt | 2018 | 0.3092 Mt |
| 1981 | 0.0584 Mt | 2000 | 0.1321 Mt | 2019 | 0.3935 Mt |
| 1982 | 0.059 Mt | 2001 | 0.1308 Mt | 2020 | 0.3319 Mt |
| 1983 | 0.0621 Mt | 2002 | 0.1432 Mt | 2021 | 0.3141 Mt |
| 1984 | 0.0737 Mt | 2003 | 0.1508 Mt | 2022 | 0.3582 Mt |
| 1985 | 0.0763 Mt | 2004 | 0.1399 Mt | 2023 | 0.3594 Mt |
| 1986 | 0.0844 Mt | 2005 | 0.1471 Mt | 2024 | 0.372 Mt |
| 1987 | 0.0949 Mt | 2006 | 0.1645 Mt | | |
| 1988 | 0.108 Mt | 2007 | 0.2054 Mt | | |
Show data table
| 1970 | 2.45 t | 1989 | 4.45 t | 2008 | 4.36 t |
| 1971 | 2.49 t | 1990 | 4.45 t | 2009 | 4.33 t |
| 1972 | 3.04 t | 1991 | 4.19 t | 2010 | 4.57 t |
| 1973 | 3.08 t | 1992 | 4.09 t | 2011 | 3.59 t |
| 1974 | 2.76 t | 1993 | 3.62 t | 2012 | 3.34 t |
| 1975 | 3.35 t | 1994 | 4.07 t | 2013 | 3.69 t |
| 1976 | 3.05 t | 1995 | 4.08 t | 2014 | 3.86 t |
| 1977 | 3.38 t | 1996 | 3.88 t | 2015 | 4.07 t |
| 1978 | 3.41 t | 1997 | 3.83 t | 2016 | 4.17 t |
| 1979 | 3.39 t | 1998 | 3.78 t | 2017 | 4.35 t |
| 1980 | 3.35 t | 1999 | 3.69 t | 2018 | 4.69 t |
| 1981 | 3.26 t | 2000 | 3.33 t | 2019 | 5.84 t |
| 1982 | 3.15 t | 2001 | 3.18 t | 2020 | 4.83 t |
| 1983 | 3.17 t | 2002 | 3.37 t | 2021 | 4.48 t |
| 1984 | 3.6 t | 2003 | 3.43 t | 2022 | 5 t |
| 1985 | 3.58 t | 2004 | 3.08 t | 2023 | 4.92 t |
| 1986 | 3.8 t | 2005 | 3.14 t | 2024 | 5 t |
| 1987 | 4.11 t | 2006 | 3.41 t | | |
| 1988 | 4.51 t | 2007 | 4.13 t | | |