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	0
1993	0
1994	0
1995	0
1996	0
1997	0
1998	0
1999	0
2000	0
2001	0
2002	0
2003	0
2004	0
2005	0
2006	5013.05
2007	6608.8
2008	7533.72
2009	7440.44
2010	8195.33
2011	7628.95
2012	7661.19
2013	5935.54
2014	7168.37
2015	7387
2016	6877.66
2017	5069.65
2018	7338.7
2019	6806.77
2020	6010.26
2021	7307.89
2022	5776.47