Mostrar tabla de datos
| 1970 | 474,51 Mt | 1989 | 711,94 Mt | 2008 | 352,23 Mt |
| 1971 | 474,15 Mt | 1990 | 785,54 Mt | 2009 | 292,23 Mt |
| 1972 | 499,65 Mt | 1991 | 741,07 Mt | 2010 | 315,91 Mt |
| 1973 | 529,29 Mt | 1992 | 650,41 Mt | 2011 | 333,31 Mt |
| 1974 | 553,27 Mt | 1993 | 567,88 Mt | 2012 | 324,92 Mt |
| 1975 | 579,49 Mt | 1994 | 470,16 Mt | 2013 | 315,27 Mt |
| 1976 | 597,17 Mt | 1995 | 464,19 Mt | 2014 | 269,33 Mt |
| 1977 | 607,48 Mt | 1996 | 397,63 Mt | 2015 | 226,11 Mt |
| 1978 | 647,7 Mt | 1997 | 382,24 Mt | 2016 | 227,25 Mt |
| 1979 | 661,38 Mt | 1998 | 364,61 Mt | 2017 | 205,58 Mt |
| 1980 | 679,26 Mt | 1999 | 364,36 Mt | 2018 | 218,3 Mt |
| 1981 | 668,73 Mt | 2000 | 361,03 Mt | 2019 | 207,91 Mt |
| 1982 | 666,77 Mt | 2001 | 360,17 Mt | 2020 | 198,9 Mt |
| 1983 | 667,33 Mt | 2002 | 360,56 Mt | 2021 | 194,14 Mt |
| 1984 | 670,28 Mt | 2003 | 392,98 Mt | 2022 | 119,35 Mt |
| 1985 | 672,3 Mt | 2004 | 368,82 Mt | 2023 | 121,7 Mt |
| 1986 | 686,42 Mt | 2005 | 357,09 Mt | 2024 | 118,48 Mt |
| 1987 | 707,75 Mt | 2006 | 356,38 Mt | | |
| 1988 | 715,79 Mt | 2007 | 367,7 Mt | | |
Mostrar tabla de datos
| 1970 | 10,04 t | 1989 | 13,71 t | 2008 | 7,52 t |
| 1971 | 9,97 t | 1990 | 15,09 t | 2009 | 6,27 t |
| 1972 | 10,42 t | 1991 | 14,2 t | 2010 | 6,8 t |
| 1973 | 10,96 t | 1992 | 12,43 t | 2011 | 7,2 t |
| 1974 | 11,39 t | 1993 | 10,85 t | 2012 | 7,03 t |
| 1975 | 11,86 t | 1994 | 9,03 t | 2013 | 6,83 t |
| 1976 | 12,16 t | 1995 | 8,98 t | 2014 | 5,86 t |
| 1977 | 12,31 t | 1996 | 7,76 t | 2015 | 4,94 t |
| 1978 | 13,08 t | 1997 | 7,53 t | 2016 | 4,98 t |
| 1979 | 13,3 t | 1998 | 7,24 t | 2017 | 4,52 t |
| 1980 | 13,6 t | 1999 | 7,29 t | 2018 | 4,83 t |
| 1981 | 13,32 t | 2000 | 7,29 t | 2019 | 4,62 t |
| 1982 | 13,23 t | 2001 | 7,33 t | 2020 | 4,45 t |
| 1983 | 13,18 t | 2002 | 7,41 t | 2021 | 4,38 t |
| 1984 | 13,17 t | 2003 | 8,13 t | 2022 | 2,91 t |
| 1985 | 13,15 t | 2004 | 7,69 t | 2023 | 3,23 t |
| 1986 | 13,38 t | 2005 | 7,5 t | 2024 | 3,13 t |
| 1987 | 13,74 t | 2006 | 7,54 t | | |
| 1988 | 13,84 t | 2007 | 7,81 t | | |