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	6
1985	757
1986	8660
1987	10896
1988	5089
1989	6045
1990	6353
1991	3493
1992	2498.9
1993	1832.03
1994	184
1995	200
1996	255
1997	365
1998	2408
1999	16860.02
2000	6991
2001	4927
2002	1206
2003	394
2004	561.5
2005	561.5
2006	1618
2007	830
2008	888
2009	670.03
2010	767.5
2011	646
2012	616
2013	371
2014	1079
2015	688
2016	185
2017	245
2018	300
2019	305
2020	322.3
2021	206.1
2022	211