Mostrar tabla de datos
| 1970 | 19,68 Mt | 1989 | 11,72 Mt | 2008 | 11,21 Mt |
| 1971 | 18,28 Mt | 1990 | 11,98 Mt | 2009 | 10,61 Mt |
| 1972 | 17,91 Mt | 1991 | 12,46 Mt | 2010 | 11,21 Mt |
| 1973 | 19,35 Mt | 1992 | 12,17 Mt | 2011 | 11,09 Mt |
| 1974 | 17,81 Mt | 1993 | 12,4 Mt | 2012 | 10,87 Mt |
| 1975 | 14,09 Mt | 1994 | 11,47 Mt | 2013 | 10,32 Mt |
| 1976 | 15,02 Mt | 1995 | 9,0785 Mt | 2014 | 9,8199 Mt |
| 1977 | 14,29 Mt | 1996 | 9,1479 Mt | 2015 | 9,3094 Mt |
| 1978 | 15,47 Mt | 1997 | 8,5485 Mt | 2016 | 9,0415 Mt |
| 1979 | 14,65 Mt | 1998 | 7,8063 Mt | 2017 | 9,1884 Mt |
| 1980 | 13,67 Mt | 1999 | 8,1662 Mt | 2018 | 9,5448 Mt |
| 1981 | 11,68 Mt | 2000 | 8,8008 Mt | 2019 | 9,6917 Mt |
| 1982 | 10,92 Mt | 2001 | 9,3343 Mt | 2020 | 7,9929 Mt |
| 1983 | 10,15 Mt | 2002 | 10,03 Mt | 2021 | 8,3806 Mt |
| 1984 | 11,19 Mt | 2003 | 10,45 Mt | 2022 | 7,2657 Mt |
| 1985 | 11,32 Mt | 2004 | 11,88 Mt | 2023 | 6,9416 Mt |
| 1986 | 11,05 Mt | 2005 | 12,11 Mt | 2024 | 7,1474 Mt |
| 1987 | 10,45 Mt | 2006 | 11,94 Mt | | |
| 1988 | 10,92 Mt | 2007 | 11,34 Mt | | |
Mostrar tabla de datos
| 1970 | 58,02 t | 1989 | 31,07 t | 2008 | 22,95 t |
| 1971 | 53,39 t | 1990 | 31,37 t | 2009 | 21,31 t |
| 1972 | 51,68 t | 1991 | 32,19 t | 2010 | 22,12 t |
| 1973 | 55,2 t | 1992 | 31,04 t | 2011 | 21,4 t |
| 1974 | 50,16 t | 1993 | 31,19 t | 2012 | 20,47 t |
| 1975 | 39,25 t | 1994 | 28,47 t | 2013 | 19 t |
| 1976 | 41,65 t | 1995 | 22,22 t | 2014 | 17,65 t |
| 1977 | 39,54 t | 1996 | 22,08 t | 2015 | 16,34 t |
| 1978 | 42,74 t | 1997 | 20,38 t | 2016 | 15,53 t |
| 1979 | 40,39 t | 1998 | 18,38 t | 2017 | 15,41 t |
| 1980 | 37,55 t | 1999 | 18,97 t | 2018 | 15,7 t |
| 1981 | 31,99 t | 2000 | 20,17 t | 2019 | 15,63 t |
| 1982 | 29,89 t | 2001 | 21,14 t | 2020 | 12,68 t |
| 1983 | 27,76 t | 2002 | 22,49 t | 2021 | 13,09 t |
| 1984 | 30,58 t | 2003 | 23,15 t | 2022 | 11,12 t |
| 1985 | 30,86 t | 2004 | 25,93 t | 2023 | 10,42 t |
| 1986 | 29,99 t | 2005 | 26,04 t | 2024 | 10,56 t |
| 1987 | 28,17 t | 2006 | 25,27 t | | |
| 1988 | 29,23 t | 2007 | 23,63 t | | |