Year	metric tons
1961	16687031
1962	23456648
1963	22676291
1964	21495445
1965	23552448
1966	20786181
1967	23555663
1968	28631568
1969	25502066
1970	24978323
1971	25117010
1972	30800751
1973	24177705
1974	27739267
1975	29440413
1976	33015527
1977	24787483
1978	29411721
1979	27889603
1980	31871630
1981	29621108
1982	32076295
1983	29406332
1984	28168845
1985	35891292
1986	38183115
1987	35166826
1988	40246266
1989	36253535
1990	44065206
1991	50216853.599999994
1992	47721721.94
1993	47770339.120000005
1994	52331482.65
1995	47641867.67
1996	60527859.18
1997	47463099.07
1998	57219295.45999999
1999	47220764.08
2000	42508910.029999994
2001	50247257.19
2002	58935115.54
2003	66782106.449999996
2004	67117409.33000001
2005	64664462.03
2006	71237433.53
2007	64003754.23
2008	50086307.050000004
2009	67440845.44
2010	61911034.02000001
2011	62726586.92
2012	63152550.55
2013	68805908.22
2014	64602073.07
2015	67003451.42
2016	61712140.93
2017	63407672.83
2018	59321717.81
2019	71478283.45
2020	62865805.17
2021	61987619.67999999
2022	55253740.940000005