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	8415
1993	7018
1994	6934
1995	5463
1996	6038
1997	4322
1998	4727
1999	4824
2000	6716
2001	4666
2002	6523
2003	5393
2004	4150
2005	5648
2006	8406
2007	14091
2008	14636
2009	15659
2010	16265
2011	16293
2012	15499
2013	13548
2014	10658
2015	9130.9
2016	11199
2017	10353.5
2018	11580.9
2019	9590.7
2020	9266.33
2021	8504.9
2022	7164.4