Year	metric tons
1961	17426967
1962	19507833
1963	22288086
1964	20037686
1965	20399648
1966	23767821
1967	23981138
1968	21751475
1969	23794107
1970	23316644
1971	28539400
1972	27457783
1973	23663294
1974	24321375
1975	30584002
1976	33809209
1977	32810045
1978	32787580
1979	35004418
1980	32946876
1981	34879900
1982	37495759
1983	33490439
1984	36602791
1985	32870954
1986	38896338
1987	37583540
1988	39708271
1989	34059321
1990	39224313
1991	40559112.61
1992	223109008.54999998
1993	217505283.25
1994	177794647.29000002
1995	155729462.84
1996	151875523.16
1997	190386777.18
1998	136549664.1
1999	144469537.11
2000	154853964.10000002
2001	194632205.87
2002	200718078.52999997
2003	165595289.97
2004	197649991.45
2005	196107575.71
2006	200521935.56
2007	192446203.04999998
2008	247680849.89999998
2009	239294695.23
2010	185461744.97
2011	253528439.42999998
2012	201026337.55
2013	255581883
2014	266256647.98
2015	265577740.48
2016	288279851.40999997
2017	292936843.75000006
2018	280793857.51
2019	295224827.37
2020	300699385.84000003
2021	302822151.29999995
2022	312047760.02