Year	metric tons
1960	80000
1961	80000
1962	90000
1963	90000
1964	90000
1965	90000
1966	110000
1967	100000
1968	106000
1969	108000
1970	110000
1971	90000
1972	80000
1973	85000
1974	75000
1975	75000
1976	75000
1977	75000
1978	75000
1979	83586
1980	88228
1981	75564
1982	73451
1983	61289
1984	54708
1985	54178
1986	61002
1987	55701
1988	55858
1989	71825
1990	70535
1991	68749
1992	68467
1993	64300
1994	62850
1995	132900
1996	111910
1997	99550
1998	98000
1999	98536
2000	109870
2001	100000
2002	100000
2003	100000
2004	100000
2005	100000
2006	100000
2007	100000
2008	100000
2009	100000
2010	100000
2011	108134
2012	71229
2013	99353
2014	80000
2015	92480
2016	102486
2017	106221
2018	90386
2019	109362
2020	117690
2021	105400
2022	110365.91