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	15
1985	11
1986	15
1987	14
1988	80
1989	0
1990	0
1991	0
1992	0
1993	0
1994	0
1995	0
1996	0
1997	0
1998	0
1999	0
2000	0
2001	0
2002	7
2003	7
2004	7
2005	350
2006	415
2007	298
2008	333
2009	428
2010	484
2011	520
2012	620
2013	787
2014	1545
2015	4579.66
2016	4327
2017	4649.66
2018	5264.14
2019	5892.45
2020	3136.91
2021	4150
2022	4550