Year	metric tons
1960	0
1961	0
1962	0
1963	0
1964	0
1965	0
1966	100
1967	100
1968	100
1969	100
1970	100
1971	100
1972	100
1973	100
1974	100
1975	100
1976	100
1977	100
1978	100
1979	100
1980	150
1981	150
1982	160
1983	160
1984	200
1985	200
1986	220
1987	320
1988	400
1989	395
1990	380
1991	300
1992	329
1993	488
1994	388
1995	375
1996	2772
1997	400
1998	500
1999	700
2000	8261
2001	36579
2002	39857
2003	38882
2004	47884
2005	57566
2006	43957
2007	61212
2008	35026
2009	46382.4
2010	59800.53
2011	93318.45
2012	77090
2013	80634
2014	78727
2015	89718
2016	65214
2017	70297
2018	78352.1
2019	101556.16
2020	88189.92
2021	95819.07
2022	91636.3