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	0
1993	1588
1994	1861
1995	1617
1996	954
1997	1254
1998	648
1999	872
2000	887
2001	999
2002	829
2003	881
2004	1180
2005	955
2006	1263
2007	1199
2008	1071
2009	834.9
2010	702.4
2011	834.5
2012	1310.56
2013	1106.2
2014	1230.66
2015	1308.63
2016	2168.65
2017	2646.26
2018	2224.41
2019	2687.54
2020	2296
2021	2514
2022	2614