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	2
1976	9
1977	17
1978	28
1979	41
1980	56
1981	72
1982	117
1983	160
1984	116
1985	147
1986	182
1987	212
1988	993
1989	820
1990	1023
1991	778
1992	859
1993	795
1994	1137
1995	960
1996	1351
1997	1875
1998	1842
1999	1095
2000	1553
2001	1868
2002	1980
2003	2086
2004	2308
2005	2603
2006	2855
2007	3662
2008	4049
2009	4544
2010	5447
2011	7234
2012	9197
2013	11935
2014	11663
2015	14584
2016	16153
2017	21933
2018	21826.2
2019	24223.2
2020	23631.1
2021	26099.2
2022	20926.06