Year	metric tons
1960	55000
1961	55000
1962	60000
1963	60000
1964	60000
1965	65000
1966	70000
1967	70000
1968	70000
1969	70000
1970	92000
1971	114000
1972	136000
1973	158000
1974	180000
1975	198850
1976	197984
1977	175000
1978	152000
1979	129000
1980	106000
1981	83650
1982	89376
1983	108766
1984	105200
1985	101180
1986	96353
1987	136140
1988	165676
1989	119224
1990	119783
1991	116454
1992	109218
1993	105772
1994	118572
1995	139861
1996	121618
1997	118995
1998	106184
1999	108809
2000	120421
2001	129907
2002	142669
2003	138833
2004	165531.4
2005	157544
2006	147782
2007	151840
2008	152031
2009	158669.4
2010	164054
2011	158723
2012	191731
2013	206522
2014	211319.4
2015	257192
2016	279691
2017	347616.25
2018	555009.45
2019	580240
2020	794725.95
2021	923786.32
2022	751823.49