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	22
1988	54
1989	51
1990	61
1991	60
1992	75
1993	75
1994	100
1995	190
1996	350
1997	350
1998	95
1999	95
2000	103
2001	570
2002	1000
2003	1300
2004	2100
2005	2120
2006	2250
2007	2350
2008	2450
2009	2600
2010	2957.42
2011	4929.06
2012	5400
2013	6450
2014	7500
2015	8481
2016	8500
2017	10781
2018	11536
2019	12750
2020	14100
2021	14150
2022	20000