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	47
1985	857
1986	10191
1987	11252
1988	5538
1989	7280
1990	11476
1991	11710
1992	6021.9
1993	3528.0299999999997
1994	3400
1995	5481
1996	9759
1997	7764
1998	8370
1999	26287.02
2000	18273
2001	14296.4
2002	5545
2003	4788
2004	6225.7
2005	8270.3
2006	11865.4
2007	2872.1
2008	3507.9500000000003
2009	6884.320000000001
2010	13065.91
2011	12545.98
2012	16303.789999999999
2013	14672.050000000001
2014	20367.710000000003
2015	16514.48
2016	10853.84
2017	5311.17
2018	5967.6
2019	6055.35
2020	5975.75
2021	12799.66
2022	12228.14