Mostrar tabla de datos
| 1970 | 43,9 Mt | 1989 | 60,45 Mt | 2008 | 41,16 Mt |
| 1971 | 43,86 Mt | 1990 | 60,63 Mt | 2009 | 37,23 Mt |
| 1972 | 44,6 Mt | 1991 | 52,67 Mt | 2010 | 39,91 Mt |
| 1973 | 45,99 Mt | 1992 | 49,2 Mt | 2011 | 37,89 Mt |
| 1974 | 46,74 Mt | 1993 | 48,17 Mt | 2012 | 36,11 Mt |
| 1975 | 48,17 Mt | 1994 | 45,4 Mt | 2013 | 36,38 Mt |
| 1976 | 49,17 Mt | 1995 | 45,76 Mt | 2014 | 33,99 Mt |
| 1977 | 51,21 Mt | 1996 | 45,99 Mt | 2015 | 34,53 Mt |
| 1978 | 57,44 Mt | 1997 | 45,56 Mt | 2016 | 35,44 Mt |
| 1979 | 58,7 Mt | 1998 | 44,67 Mt | 2017 | 37,73 Mt |
| 1980 | 62,75 Mt | 1999 | 43,89 Mt | 2018 | 37,24 Mt |
| 1981 | 60,85 Mt | 2000 | 41,68 Mt | 2019 | 34,81 Mt |
| 1982 | 59,09 Mt | 2001 | 41,98 Mt | 2020 | 32,64 Mt |
| 1983 | 58,86 Mt | 2002 | 41,95 Mt | 2021 | 36,65 Mt |
| 1984 | 61,06 Mt | 2003 | 42,4 Mt | 2022 | 33,19 Mt |
| 1985 | 60,82 Mt | 2004 | 41,84 Mt | 2023 | 31,15 Mt |
| 1986 | 58 Mt | 2005 | 42,24 Mt | 2024 | 29,89 Mt |
| 1987 | 59,83 Mt | 2006 | 42,26 Mt | | |
| 1988 | 60,88 Mt | 2007 | 41,34 Mt | | |
Mostrar tabla de datos
| 1970 | 9,67 t | 1989 | 11,46 t | 2008 | 7,65 t |
| 1971 | 9,62 t | 1990 | 11,44 t | 2009 | 6,91 t |
| 1972 | 9,7 t | 1991 | 9,93 t | 2010 | 7,4 t |
| 1973 | 9,91 t | 1992 | 9,27 t | 2011 | 7,02 t |
| 1974 | 9,97 t | 1993 | 9,05 t | 2012 | 6,68 t |
| 1975 | 10,16 t | 1994 | 8,49 t | 2013 | 6,72 t |
| 1976 | 10,27 t | 1995 | 8,53 t | 2014 | 6,27 t |
| 1977 | 10,58 t | 1996 | 8,56 t | 2015 | 6,37 t |
| 1978 | 11,75 t | 1997 | 8,46 t | 2016 | 6,53 t |
| 1979 | 11,88 t | 1998 | 8,29 t | 2017 | 6,94 t |
| 1980 | 12,6 t | 1999 | 8,13 t | 2018 | 6,84 t |
| 1981 | 12,13 t | 2000 | 7,74 t | 2019 | 6,38 t |
| 1982 | 11,69 t | 2001 | 7,8 t | 2020 | 5,98 t |
| 1983 | 11,56 t | 2002 | 7,8 t | 2021 | 6,73 t |
| 1984 | 11,91 t | 2003 | 7,89 t | 2022 | 6,11 t |
| 1985 | 11,78 t | 2004 | 7,79 t | 2023 | 5,74 t |
| 1986 | 11,17 t | 2005 | 7,86 t | 2024 | 5,51 t |
| 1987 | 11,46 t | 2006 | 7,86 t | | |
| 1988 | 11,6 t | 2007 | 7,69 t | | |