Year	metric tons
1960	44300
1961	38600
1962	42500
1963	49700
1964	46300
1965	53500
1966	48200
1967	57500
1968	68900
1969	64900
1970	91020
1971	102580
1972	107040
1973	152078
1974	176500
1975	215789
1976	282793
1977	425506
1978	614512
1979	605275
1980	639542
1981	539294
1982	607927
1983	372429
1984	883405
1985	1087676
1986	1004271
1987	680134
1988	876024
1989	682793
1990	366643
1991	437670
1992	343511
1993	374396
1994	419344
1995	614795
1996	811854
1997	671384
1998	468138
1999	629607
2000	657800
2001	645357
2002	396805
2003	494804
2004	465447
2005	602949
2006	638648
2007	579946
2008	678793
2009	718142
2010	672594.8
2011	818495
2012	824536
2013	841413
2014	1024940
2015	1059321.4
2016	1160576.3
2017	1108129
2018	1179204
2019	1304010.22
2020	1410927.23
2021	1767241.8900000001
2022	1811374.27