Year	metric tons
1961	226648
1962	223800
1963	223400
1964	222000
1965	216800
1966	223400
1967	217300
1968	212506
1969	211684
1970	182536
1971	197254
1972	104350
1973	150350
1974	264905
1975	154422
1976	119658
1977	251026
1978	288249
1979	228837
1980	194497
1981	171796
1982	125048
1983	123097
1984	131679
1985	167107
1986	132455
1987	146191
1988	233910
1989	199365
1990	242119
1991	67253.8
1992	93800.14
1993	153256.22
1994	222852.81
1995	81221
1996	257418
1997	206026
1998	171933
1999	173865
2000	149723.48
2001	254959.76
2002	149947.22
2003	116475.05
2004	109279.54
2005	111647.04
2006	87205
2007	71887
2008	72997
2009	74121
2010	173193
2011	103897.43
2012	101382.16
2013	107452
2014	115733.29
2015	82840.23
2016	25678.06
2017	216011.86
2018	157857.07
2019	35105
2020	28534.31
2021	98320.46
2022	82451.25