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	8080
1991	24970
1992	21230
1993	17680
1994	24590
1995	39170
1996	47740
1997	36670
1998	43050
1999	36670
2000	49910
2001	81860
2002	111830
2003	94640
2004	71860
2005	73620
2006	76760
2007	84850
2008	107925
2009	102681.95
2010	125157
2011	130400
2012	150885.79
2013	110444.77
2014	133030.59
2015	167236.94
2016	111159.23
2017	109815.46
2018	104266.22
2019	96652
2020	87867
2021	105329
2022	120621