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	2023
1993	2715
1994	1107
1995	384
1996	203
1997	191
1998	216
1999	224
2000	253
2001	236
2002	324
2003	325
2004	210
2005	193
2006	241
2007	251
2008	406
2009	790.1
2010	1207.2
2011	1380
2012	988.8
2013	1582.9
2014	1617.6
2015	1626.01
2016	1538.99
2017	1575
2018	1707.99
2019	2452.33
2020	2584.8599999999997
2021	4389.219999999999
2022	4673