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	100
1986	100
1987	100
1988	35
1989	40
1990	40
1991	40
1992	21
1993	9
1994	11
1995	11
1996	12
1997	3
1998	2
1999	137
2000	1
2001	29
2002	18
2003	22
2004	6
2005	15
2006	10.24
2007	10.39
2008	7.04
2009	12.36
2010	20.9
2011	21.8
2012	27.9
2013	44.3
2014	36.2
2015	26.1
2016	32.44
2017	27.45
2018	60
2019	119.72
2020	91.89
2021	210.72
2022	209.43