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	6802
1993	4603
1994	4941
1995	4007
1996	2889
1997	3510
1998	5989
1999	6313
2000	6876
2001	10468
2002	9095
2003	9505
2004	12834
2005	13842
2006	18847
2007	16135
2008	15729
2009	16328.55
2010	15678.51
2011	14604
2012	11222.1
2013	13720.21
2014	13767.99
2015	16874.85
2016	17269.05
2017	17114.41
2018	19680.31
2019	20442.97
2020	21718.27
2021	27010.33
2022	27156.05