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	28
1987	140
1988	331
1989	1240
1990	1988
1991	2153
1992	2380
1993	2503
1994	2235
1995	2696
1996	3835
1997	4690
1998	5101
1999	5620
2000	6004
2001	8218
2002	6744
2003	11824
2004	11172
2005	14375
2006	15586
2007	18410.4
2008	22340
2009	26441.85
2010	26374
2011	16076
2012	12737
2013	9266
2014	23880
2015	30000
2016	39945
2017	55025
2018	72025
2019	75562.8
2020	99906.61
2021	114489.66
2022	119844.7