Mostrar tabla de datos
| 1970 | 469,21 Mt | 1989 | 390,08 Mt | 2008 | 382,58 Mt |
| 1971 | 481,32 Mt | 1990 | 384,98 Mt | 2009 | 369,94 Mt |
| 1972 | 498,87 Mt | 1991 | 410,04 Mt | 2010 | 377,28 Mt |
| 1973 | 535,51 Mt | 1992 | 396,63 Mt | 2011 | 363,69 Mt |
| 1974 | 516,77 Mt | 1993 | 376,97 Mt | 2012 | 365,02 Mt |
| 1975 | 476,25 Mt | 1994 | 372,67 Mt | 2013 | 360,16 Mt |
| 1976 | 521,75 Mt | 1995 | 381,75 Mt | 2014 | 326,95 Mt |
| 1977 | 503,18 Mt | 1996 | 396,42 Mt | 2015 | 332,15 Mt |
| 1978 | 521,19 Mt | 1997 | 388,14 Mt | 2016 | 334,77 Mt |
| 1979 | 528,76 Mt | 1998 | 410,11 Mt | 2017 | 338,71 Mt |
| 1980 | 506,79 Mt | 1999 | 403,85 Mt | 2018 | 328,55 Mt |
| 1981 | 456,45 Mt | 2000 | 400,87 Mt | 2019 | 322,9 Mt |
| 1982 | 435,4 Mt | 2001 | 404,98 Mt | 2020 | 287,09 Mt |
| 1983 | 416,26 Mt | 2002 | 399,58 Mt | 2021 | 316,7 Mt |
| 1984 | 404,7 Mt | 2003 | 404,48 Mt | 2022 | 307,68 Mt |
| 1985 | 394,43 Mt | 2004 | 405,51 Mt | 2023 | 284,15 Mt |
| 1986 | 382,32 Mt | 2005 | 407,76 Mt | 2024 | 274,45 Mt |
| 1987 | 375,49 Mt | 2006 | 397,02 Mt | | |
| 1988 | 375,56 Mt | 2007 | 389,86 Mt | | |
Mostrar tabla de datos
| 1970 | 9,02 t | 1989 | 6,73 t | 2008 | 5,94 t |
| 1971 | 9,17 t | 1990 | 6,61 t | 2009 | 5,72 t |
| 1972 | 9,42 t | 1991 | 7 t | 2010 | 5,8 t |
| 1973 | 10,03 t | 1992 | 6,74 t | 2011 | 5,57 t |
| 1974 | 9,61 t | 1993 | 6,38 t | 2012 | 5,56 t |
| 1975 | 8,82 t | 1994 | 6,28 t | 2013 | 5,46 t |
| 1976 | 9,62 t | 1995 | 6,41 t | 2014 | 4,93 t |
| 1977 | 9,23 t | 1996 | 6,63 t | 2015 | 4,99 t |
| 1978 | 9,52 t | 1997 | 6,47 t | 2016 | 5,02 t |
| 1979 | 9,62 t | 1998 | 6,81 t | 2017 | 5,06 t |
| 1980 | 9,17 t | 1999 | 6,68 t | 2018 | 4,89 t |
| 1981 | 8,21 t | 2000 | 6,58 t | 2019 | 4,79 t |
| 1982 | 7,8 t | 2001 | 6,6 t | 2020 | 4,25 t |
| 1983 | 7,42 t | 2002 | 6,46 t | 2021 | 4,67 t |
| 1984 | 7,18 t | 2003 | 6,5 t | 2022 | 4,51 t |
| 1985 | 6,96 t | 2004 | 6,47 t | 2023 | 4,16 t |
| 1986 | 6,71 t | 2005 | 6,45 t | 2024 | 4 t |
| 1987 | 6,56 t | 2006 | 6,24 t | | |
| 1988 | 6,52 t | 2007 | 6,09 t | | |