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	9922
1993	10011
1994	7721
1995	6178
1996	6859
1997	4821
1998	5184
1999	5804
2000	7269
2001	5610
2002	7543
2003	6196
2004	4733
2005	6242
2006	9051
2007	14780
2008	15445
2009	16485
2010	17162
2011	17415
2012	16464
2013	14245
2014	11424
2015	9999.9
2016	11887.3
2017	11126.8
2018	12381.3
2019	10252.7
2020	10205.38
2021	9116.13
2022	7520.4