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	13
1985	15
1986	1530
1987	349
1988	443
1989	1228
1990	5116
1991	8209
1992	3513
1993	1684
1994	3200
1995	5265
1996	9489
1997	7383
1998	5942
1999	9409
2000	11188
2001	9282
2002	4262
2003	3913
2004	3913
2005	5012
2006	8849
2007	1117
2008	1094.14
2009	1798.16
2010	4756
2011	4293
2012	8291
2013	2261
2014	6932
2015	3512
2016	2
2017	152
2018	2
2019	2
2020	2
2021	2
2022	2