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	7
1985	7
1986	7
1987	9
1988	6
1989	2
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	0
2003	2300
2004	570
2005	590
2006	610
2007	644
2008	1343
2009	130
2010	198
2011	415
2012	420
2013	780
2014	788
2015	790
2016	2684.9
2017	3255
2018	3230
2019	3240
2020	3047.78
2021	2662.94
2022	3524.96