Year	metric tons
1960	0
1961	0
1962	0
1963	0
1964	0
1965	0
1966	0
1967	0
1968	0
1969	0
1970	0
1971	0
1972	0
1973	0
1974	0
1975	0
1976	0
1977	0
1978	0
1979	0
1980	0
1981	0
1982	0
1983	0
1984	0
1985	0
1986	0
1987	0
1988	0
1989	0
1990	0
1991	0
1992	39145
1993	18820
1994	7641
1995	3717
1996	2554
1997	2644
1998	3097
1999	1496
2000	1877
2001	1716
2002	1863
2003	3362
2004	12060
2005	10081
2006	14896
2007	44248
2008	48865
2009	50731
2010	46899
2011	27547
2012	13225
2013	16825
2014	20515
2015	24175
2016	46513.69
2017	139465.38
2018	205905
2019	254200.15000000002
2020	209176.9
2021	200365.44999999998
2022	200531.57