Show data table
| 1970 | 26.61 Mt | 1989 | 39.93 Mt | 2008 | 77.76 Mt |
| 1971 | 26.86 Mt | 1990 | 42.7 Mt | 2009 | 78.65 Mt |
| 1972 | 27.82 Mt | 1991 | 42.89 Mt | 2010 | 84.97 Mt |
| 1973 | 31.5 Mt | 1992 | 46.61 Mt | 2011 | 84.59 Mt |
| 1974 | 30 Mt | 1993 | 50.32 Mt | 2012 | 89.5 Mt |
| 1975 | 32.91 Mt | 1994 | 54.23 Mt | 2013 | 97.49 Mt |
| 1976 | 32.8 Mt | 1995 | 65.35 Mt | 2014 | 104.01 Mt |
| 1977 | 35.76 Mt | 1996 | 68.69 Mt | 2015 | 113.19 Mt |
| 1978 | 36.83 Mt | 1997 | 76.87 Mt | 2016 | 121.3 Mt |
| 1979 | 39.61 Mt | 1998 | 75.58 Mt | 2017 | 135.65 Mt |
| 1980 | 35.69 Mt | 1999 | 73.99 Mt | 2018 | 141.34 Mt |
| 1981 | 33.94 Mt | 2000 | 74.26 Mt | 2019 | 147.92 Mt |
| 1982 | 34.14 Mt | 2001 | 71.69 Mt | 2020 | 136.38 Mt |
| 1983 | 36.59 Mt | 2002 | 72.94 Mt | 2021 | 145.61 Mt |
| 1984 | 32.34 Mt | 2003 | 74.77 Mt | 2022 | 151.7 Mt |
| 1985 | 32.09 Mt | 2004 | 75.69 Mt | 2023 | 162.45 Mt |
| 1986 | 30.19 Mt | 2005 | 78.88 Mt | 2024 | 174.11 Mt |
| 1987 | 37 Mt | 2006 | 70.97 Mt | | |
| 1988 | 38.55 Mt | 2007 | 76.96 Mt | | |
Show data table
| 1970 | 0.71 t | 1989 | 0.65 t | 2008 | 0.84 t |
| 1971 | 0.7 t | 1990 | 0.68 t | 2009 | 0.83 t |
| 1972 | 0.71 t | 1991 | 0.67 t | 2010 | 0.88 t |
| 1973 | 0.78 t | 1992 | 0.71 t | 2011 | 0.86 t |
| 1974 | 0.73 t | 1993 | 0.75 t | 2012 | 0.89 t |
| 1975 | 0.78 t | 1994 | 0.79 t | 2013 | 0.96 t |
| 1976 | 0.76 t | 1995 | 0.93 t | 2014 | 1 t |
| 1977 | 0.81 t | 1996 | 0.95 t | 2015 | 1.07 t |
| 1978 | 0.81 t | 1997 | 1.04 t | 2016 | 1.14 t |
| 1979 | 0.85 t | 1998 | 1 t | 2017 | 1.25 t |
| 1980 | 0.74 t | 1999 | 0.95 t | 2018 | 1.29 t |
| 1981 | 0.69 t | 2000 | 0.93 t | 2019 | 1.34 t |
| 1982 | 0.67 t | 2001 | 0.88 t | 2020 | 1.22 t |
| 1983 | 0.7 t | 2002 | 0.88 t | 2021 | 1.29 t |
| 1984 | 0.6 t | 2003 | 0.88 t | 2022 | 1.33 t |
| 1985 | 0.58 t | 2004 | 0.88 t | 2023 | 1.41 t |
| 1986 | 0.53 t | 2005 | 0.9 t | 2024 | 1.5 t |
| 1987 | 0.64 t | 2006 | 0.79 t | | |
| 1988 | 0.65 t | 2007 | 0.85 t | | |