Year	metric tons
1961	208480000
1962	216304400
1963	227206697
1964	235295018
1965	216400818
1966	220787582
1967	250701252
1968	258326841
1969	269289998
1970	282224438
1971	288233802
1972	278121230
1973	291058559
1974	289361372
1975	322123566
1976	321068885
1977	338202933
1978	356017346
1979	335087932
1980	364731823
1981	400067639
1982	382089817
1983	410311522
1984	414690159
1985	427538170
1986	432466879
1987	418919688
1988	455684953
1989	469375549
1990	479475103.91999996
1991	481666568.24
1992	501392408.65000004
1993	523144434.73
1994	523003361.78999996
1995	528242445.5300001
1996	555540919.3600001
1997	564918597.49
1998	580665148.8599999
1999	585731164.96
2000	607090862.26
2001	612399070.05
2002	586583170.65
2003	630368522.9799999
2004	636427575.5200001
2005	673409677.1499999
2006	672494022.29
2007	705683019.22
2008	722305894.79
2009	707013683.9500002
2010	741523628.05
2011	767698908.5899999
2012	781283638.9899999
2013	800662819.19
2014	805043534.7799999
2015	805102542.43
2016	817825813.56
2017	871778736.6500001
2018	871326015.87
2019	884615716.3399999
2020	909223717.9299997
2021	924287758.3400003
2022	938156295.4900001