Year	metric tons
1961	528113
1962	537800
1963	620300
1964	686000
1965	723168
1966	595250
1967	855300
1968	537200
1969	843910
1970	533538
1971	733603
1972	383900
1973	611468
1974	959176
1975	789550
1976	730300
1977	542029
1978	1007066
1979	664187
1980	675935
1981	1209357
1982	781530
1983	523134
1984	709278
1985	1248822
1986	887042
1987	1053882
1988	866900
1989	1066787
1990	977080
1991	1021134
1992	973178
1993	1185204
1994	1066462
1995	1186701
1996	976079
1997	801217
1998	730335
1999	1255629
2000	1025921
2001	1022611
2002	785396
2003	1451891
2004	1053583
2005	1432831
2006	988315
2007	772239
2008	1739656
2009	1831567
2010	1767822.21
2011	1099275
2012	1499756.65
2013	1270937
2014	1251248
2015	2152246
2016	2247093
2017	2516465
2018	2889218.28
2019	2768798.88
2020	3640544.67
2021	3535752.94
2022	3663690