Mostrar tabla de datos
| 1970 | 21,9 Mt | 1989 | 41,72 Mt | 2008 | 26,67 Mt |
| 1971 | 22,07 Mt | 1990 | 38,67 Mt | 2009 | 26,94 Mt |
| 1972 | 21,7 Mt | 1991 | 30,13 Mt | 2010 | 28,18 Mt |
| 1973 | 23,39 Mt | 1992 | 23,92 Mt | 2011 | 27,75 Mt |
| 1974 | 25,37 Mt | 1993 | 21,87 Mt | 2012 | 28,89 Mt |
| 1975 | 26,08 Mt | 1994 | 22,5 Mt | 2013 | 29,02 Mt |
| 1976 | 27,52 Mt | 1995 | 23,94 Mt | 2014 | 26,91 Mt |
| 1977 | 30 Mt | 1996 | 25,93 Mt | 2015 | 29,44 Mt |
| 1978 | 32,16 Mt | 1997 | 28,38 Mt | 2016 | 27,3 Mt |
| 1979 | 32,57 Mt | 1998 | 27,86 Mt | 2017 | 26,51 Mt |
| 1980 | 33,41 Mt | 1999 | 28,64 Mt | 2018 | 26,78 Mt |
| 1981 | 33,66 Mt | 2000 | 29 Mt | 2019 | 22,29 Mt |
| 1982 | 33,47 Mt | 2001 | 27,82 Mt | 2020 | 18,48 Mt |
| 1983 | 36,04 Mt | 2002 | 26,57 Mt | 2021 | 21,76 Mt |
| 1984 | 38,03 Mt | 2003 | 25,8 Mt | 2022 | 19,76 Mt |
| 1985 | 35,4 Mt | 2004 | 25,32 Mt | 2023 | 20,03 Mt |
| 1986 | 36,03 Mt | 2005 | 26,21 Mt | 2024 | 21 Mt |
| 1987 | 39,25 Mt | 2006 | 26,79 Mt | | |
| 1988 | 40,93 Mt | 2007 | 27,61 Mt | | |
Mostrar tabla de datos
| 1970 | 2,48 t | 1989 | 3,96 t | 2008 | 2,36 t |
| 1971 | 2,46 t | 1990 | 3,64 t | 2009 | 2,39 t |
| 1972 | 2,38 t | 1991 | 2,81 t | 2010 | 2,49 t |
| 1973 | 2,53 t | 1992 | 2,22 t | 2011 | 2,46 t |
| 1974 | 2,71 t | 1993 | 2,02 t | 2012 | 2,56 t |
| 1975 | 2,75 t | 1994 | 2,07 t | 2013 | 2,57 t |
| 1976 | 2,88 t | 1995 | 2,19 t | 2014 | 2,38 t |
| 1977 | 3,11 t | 1996 | 2,37 t | 2015 | 2,61 t |
| 1978 | 3,31 t | 1997 | 2,58 t | 2016 | 2,42 t |
| 1979 | 3,34 t | 1998 | 2,53 t | 2017 | 2,36 t |
| 1980 | 3,41 t | 1999 | 2,59 t | 2018 | 2,39 t |
| 1981 | 3,42 t | 2000 | 2,61 t | 2019 | 1,99 t |
| 1982 | 3,38 t | 2001 | 2,5 t | 2020 | 1,65 t |
| 1983 | 3,61 t | 2002 | 2,38 t | 2021 | 1,96 t |
| 1984 | 3,78 t | 2003 | 2,3 t | 2022 | 1,79 t |
| 1985 | 3,48 t | 2004 | 2,25 t | 2023 | 1,82 t |
| 1986 | 3,52 t | 2005 | 2,33 t | 2024 | 1,91 t |
| 1987 | 3,8 t | 2006 | 2,38 t | | |
| 1988 | 3,92 t | 2007 | 2,45 t | | |