Year	metric tons
1961	394555712
1962	420392662
1963	450634625
1964	473495357
1965	467400434
1966	484499289
1967	523907553
1968	529307084
1969	544516508
1970	586479451
1971	605191785
1972	588399499
1973	621089951
1974	639098357
1975	682562991
1976	697783984
1977	698658948
1978	746381143
1979	746306482
1980	773211592
1981	817009955
1982	832787793
1983	886755109
1984	916365505
1985	917047641
1986	940223064
1987	930305330
1988	976541661
1989	1008244319
1990	1037705456.61
1991	1050999237.2399998
1992	1259389007.81
1993	1277210465.4699998
1994	1242447717.8600001
1995	1245079240.76
1996	1309934858
1997	1341374845.55
1998	1321195931.54
1999	1340002436.1500003
2000	1313434940.4399998
2001	1374400957.66
2002	1352313546.0900002
2003	1368550597.8200002
2004	1434537562.83
2005	1482535582.3500001
2006	1523192037.9699998
2007	1568213574.65
2008	1684168058.0500002
2009	1653537150.6400006
2010	1669387458.0900002
2011	1787863070.32
2012	1790845427.7999995
2013	1890037611.3100004
2014	1922801004.309999
2015	1968556615.25
2016	1988085439.7799995
2017	2083000706.3299997
2018	2064685324.4900005
2019	2104309307.9100003
2020	2148606153.2699995
2021	2178526892.02
2022	2208818122.6200004