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	188467
1993	117171
1994	49162
1995	57368
1996	88514
1997	44002
1998	66578
1999	72962
2000	78988
2001	150831
2002	150146
2003	157205
2004	161988
2005	139785
2006	154548
2007	187513
2008	182760
2009	172692
2010	149851
2011	138557
2012	66970
2013	90871
2014	150067
2015	85144
2016	106945
2017	89770
2018	75019.25
2019	102219.91
2020	90991.31
2021	96152.49
2022	106922.15