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	15
1987	25
1988	13
1989	13
1990	67
1991	67
1992	50
1993	81
1994	103
1995	114
1996	191
1997	130
1998	196
1999	249
2000	390
2001	487
2002	580
2003	684
2004	775
2005	650
2006	660
2007	791
2008	972
2009	1024.6
2010	1130.2
2011	1091.1
2012	882.24
2013	973.13
2014	1317.75
2015	1769.2
2016	1499.65
2017	1377.2
2018	1466.6
2019	1378.2
2020	1107.37
2021	1145
2022	1190