Mostrar tabla de datos
| 1970 | 673,62 Mt | 1989 | 579,54 Mt | 2008 | 533,91 Mt |
| 1971 | 668,88 Mt | 1990 | 582,61 Mt | 2009 | 483,47 Mt |
| 1972 | 657,94 Mt | 1991 | 591,74 Mt | 2010 | 500,75 Mt |
| 1973 | 690,26 Mt | 1992 | 578,44 Mt | 2011 | 459,21 Mt |
| 1974 | 644,87 Mt | 1993 | 562,4 Mt | 2012 | 481,39 Mt |
| 1975 | 623,9 Mt | 1994 | 554,88 Mt | 2013 | 470,22 Mt |
| 1976 | 630,05 Mt | 1995 | 548,34 Mt | 2014 | 430,66 Mt |
| 1977 | 638,55 Mt | 1996 | 567,62 Mt | 2015 | 415,88 Mt |
| 1978 | 636,71 Mt | 1997 | 546,74 Mt | 2016 | 391,86 Mt |
| 1979 | 672,9 Mt | 1998 | 547,41 Mt | 2017 | 380,71 Mt |
| 1980 | 608,56 Mt | 1999 | 544,01 Mt | 2018 | 373,88 Mt |
| 1981 | 589,25 Mt | 2000 | 551,96 Mt | 2019 | 359,01 Mt |
| 1982 | 573,33 Mt | 2001 | 563,12 Mt | 2020 | 319,7 Mt |
| 1983 | 566,5 Mt | 2002 | 547,16 Mt | 2021 | 337,91 Mt |
| 1984 | 550,2 Mt | 2003 | 560,74 Mt | 2022 | 324,99 Mt |
| 1985 | 576,79 Mt | 2004 | 561,17 Mt | 2023 | 304,79 Mt |
| 1986 | 590,78 Mt | 2005 | 559,52 Mt | 2024 | 292,42 Mt |
| 1987 | 595,44 Mt | 2006 | 559,93 Mt | | |
| 1988 | 593,14 Mt | 2007 | 550,42 Mt | | |
Mostrar tabla de datos
| 1970 | 12,1 t | 1989 | 10,15 t | 2008 | 8,64 t |
| 1971 | 11,97 t | 1990 | 10,18 t | 2009 | 7,76 t |
| 1972 | 11,73 t | 1991 | 10,3 t | 2010 | 7,98 t |
| 1973 | 12,28 t | 1992 | 10,05 t | 2011 | 7,26 t |
| 1974 | 11,47 t | 1993 | 9,74 t | 2012 | 7,56 t |
| 1975 | 11,1 t | 1994 | 9,59 t | 2013 | 7,33 t |
| 1976 | 11,21 t | 1995 | 9,45 t | 2014 | 6,66 t |
| 1977 | 11,36 t | 1996 | 9,76 t | 2015 | 6,39 t |
| 1978 | 11,33 t | 1997 | 9,38 t | 2016 | 5,97 t |
| 1979 | 11,96 t | 1998 | 9,36 t | 2017 | 5,77 t |
| 1980 | 10,81 t | 1999 | 9,27 t | 2018 | 5,64 t |
| 1981 | 10,46 t | 2000 | 9,37 t | 2019 | 5,39 t |
| 1982 | 10,18 t | 2001 | 9,53 t | 2020 | 4,79 t |
| 1983 | 10,06 t | 2002 | 9,22 t | 2021 | 5,04 t |
| 1984 | 9,75 t | 2003 | 9,4 t | 2022 | 4,81 t |
| 1985 | 10,2 t | 2004 | 9,35 t | 2023 | 4,45 t |
| 1986 | 10,42 t | 2005 | 9,26 t | 2024 | 4,22 t |
| 1987 | 10,48 t | 2006 | 9,2 t | | |
| 1988 | 10,42 t | 2007 | 8,98 t | | |