Year	metric tons
1960	13527807.01
1961	15607729
1962	17880589
1963	18416458
1964	21787273
1965	20740998
1966	22935696.009999998
1967	25099409
1968	26681318
1969	25834680
1970	29114632
1971	28261587
1972	23713531
1973	22284154
1974	24505857
1975	23810674
1976	24958882
1977	25056176.990000002
1978	26963937.91
1979	27079923.81
1980	26759848.1
1981	27607139.08
1982	29364627.64
1983	28685548.080000002
1984	32051352.01
1985	34832566.120000005
1986	38699767.81
1987	40214040.059999995
1988	44274736.92
1989	45925160.4
1990	46889230.84
1991	49865044.080000006
1992	61832725.02999999
1993	67443181.12
1994	75452194.91000001
1995	79364215.37
1996	84971448.17999999
1997	84946974.59
1998	83846019.72
1999	91803961.59
2000	96602131.66999999
2001	96084522.25999999
2002	99437117.71
2003	100231537.25
2004	107935041.81
2005	111898295.79999998
2006	114015698.06
2007	117781198.71
2008	122133918.59000002
2009	125812700.99999999
2010	128603631.14000002
2011	136206972.85
2012	140320550.64
2013	148709267.73
2014	152653914.14
2015	158570906.11
2016	162079266.25000006
2017	167222080.84999996
2018	173464884.57999983
2019	173958602.92000002
2020	175465815.0799999
2021	179869133.60999987
2022	182705298.28