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	3379
1993	2928
1994	1161
1995	1948
1996	1682
1997	1921
1998	1106
1999	1193
2000	813
2001	309
2002	778
2003	820
2004	188.2
2005	123
2006	256
2007	170
2008	206
2009	303
2010	224
2011	858
2012	738
2013	811
2014	410
2015	730.4
2016	1878
2017	2776
2018	5653.26
2019	6933.09
2020	6804.56
2021	5438.4
2022	9438.33