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	129689
1993	147515
1994	124508
1995	132891
1996	108992
1997	126317
1998	121854
1999	113312
2000	113572
2001	105959
2002	102622
2003	80580
2004	88877
2005	100136
2006	87587
2007	100216
2008	103393
2009	99157.6
2010	96304.04
2011	81968.34
2012	67194.4
2013	70187.21
2014	69753.47
2015	73993.7
2016	76523.73
2017	83690.46
2018	87994.66
2019	87816.97
2020	75232.59
2021	73085
2022	74739.56