Year	metric tons
1960	500
1961	400
1962	600
1963	600
1964	600
1965	1006
1966	1009
1967	1014
1968	1412
1969	1409
1970	1363
1971	1255
1972	1340
1973	1459
1974	1221
1975	950
1976	1083
1977	1220
1978	1276
1979	1314
1980	1339
1981	1462
1982	1591
1983	1988.77
1984	2266
1985	2438
1986	2598.39
1987	2593
1988	2563
1989	2625
1990	2709
1991	3048
1992	9491
1993	10275
1994	9718
1995	9772
1996	13313
1997	25788
1998	20482
1999	41060
2000	70223
2001	56606
2002	142941
2003	49561
2004	82269
2005	64933
2006	33547
2007	5646
2008	5782
2009	4754.7
2010	5493.8
2011	5854.98
2012	5656.71
2013	6522.09
2014	6103.34
2015	7335.54
2016	8118.86
2017	9031.11
2018	8837.05
2019	9638.34
2020	8669.87
2021	9263.59
2022	8894.92