Mostrar tabla de datos
| 1970 | 61,96 Mt | 1989 | 51,81 Mt | 2008 | 50,6 Mt |
| 1971 | 57,69 Mt | 1990 | 52,43 Mt | 2009 | 48,41 Mt |
| 1972 | 59,74 Mt | 1991 | 63,09 Mt | 2010 | 48,56 Mt |
| 1973 | 58,79 Mt | 1992 | 57,39 Mt | 2011 | 43,48 Mt |
| 1974 | 52,39 Mt | 1993 | 59,71 Mt | 2012 | 38,6 Mt |
| 1975 | 54,68 Mt | 1994 | 63,69 Mt | 2013 | 40,34 Mt |
| 1976 | 60,39 Mt | 1995 | 60,59 Mt | 2014 | 36,2 Mt |
| 1977 | 62,09 Mt | 1996 | 74,02 Mt | 2015 | 34,07 Mt |
| 1978 | 62,03 Mt | 1997 | 64,25 Mt | 2016 | 35,68 Mt |
| 1979 | 65,45 Mt | 1998 | 60,26 Mt | 2017 | 33,55 Mt |
| 1980 | 64,88 Mt | 1999 | 57,28 Mt | 2018 | 33,54 Mt |
| 1981 | 54,56 Mt | 2000 | 53,15 Mt | 2019 | 30,08 Mt |
| 1982 | 56,85 Mt | 2001 | 54,74 Mt | 2020 | 27,79 Mt |
| 1983 | 53,32 Mt | 2002 | 54,26 Mt | 2021 | 29,56 Mt |
| 1984 | 54,95 Mt | 2003 | 59,69 Mt | 2022 | 28,49 Mt |
| 1985 | 62,75 Mt | 2004 | 54,12 Mt | 2023 | 26,21 Mt |
| 1986 | 63,38 Mt | 2005 | 50,65 Mt | 2024 | 25,57 Mt |
| 1987 | 61,42 Mt | 2006 | 58,6 Mt | | |
| 1988 | 57,49 Mt | 2007 | 53,87 Mt | | |
Mostrar tabla de datos
| 1970 | 12,57 t | 1989 | 10,09 t | 2008 | 9,21 t |
| 1971 | 11,62 t | 1990 | 10,2 t | 2009 | 8,76 t |
| 1972 | 11,97 t | 1991 | 12,24 t | 2010 | 8,75 t |
| 1973 | 11,71 t | 1992 | 11,1 t | 2011 | 7,81 t |
| 1974 | 10,38 t | 1993 | 11,51 t | 2012 | 6,9 t |
| 1975 | 10,81 t | 1994 | 12,23 t | 2013 | 7,18 t |
| 1976 | 11,9 t | 1995 | 11,58 t | 2014 | 6,41 t |
| 1977 | 12,2 t | 1996 | 14,06 t | 2015 | 5,99 t |
| 1978 | 12,15 t | 1997 | 12,16 t | 2016 | 6,23 t |
| 1979 | 12,79 t | 1998 | 11,36 t | 2017 | 5,82 t |
| 1980 | 12,66 t | 1999 | 10,76 t | 2018 | 5,79 t |
| 1981 | 10,65 t | 2000 | 9,95 t | 2019 | 5,17 t |
| 1982 | 11,11 t | 2001 | 10,22 t | 2020 | 4,77 t |
| 1983 | 10,42 t | 2002 | 10,09 t | 2021 | 5,05 t |
| 1984 | 10,75 t | 2003 | 11,07 t | 2022 | 4,83 t |
| 1985 | 12,27 t | 2004 | 10,01 t | 2023 | 4,41 t |
| 1986 | 12,38 t | 2005 | 9,35 t | 2024 | 4,28 t |
| 1987 | 11,98 t | 2006 | 10,78 t | | |
| 1988 | 11,21 t | 2007 | 9,86 t | | |