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	149
1993	253
1994	127
1995	100
1996	110
1997	120
1998	135
1999	150
2000	167
2001	137
2002	181
2003	158
2004	184
2005	167
2006	215
2007	225
2008	380
2009	535
2010	690
2011	843
2012	714
2013	1179
2014	1174
2015	1176.01
2016	1099.99
2017	1105
2018	1195.99
2019	1716.33
2020	1809.86
2021	2350.22
2022	2425