Year	metric tons
1961	157934152
1962	173166747
1963	189611204
1964	207306068
1965	215089712
1966	232593695
1967	234696540
1968	236921076
1969	238995438
1970	268898915
1971	280438014
1972	268733050
1973	293573312
1974	305363189
1975	318288001
1976	325807492
1977	317049284
1978	355207445
1979	375558730
1980	373333558
1981	386002632
1982	416061639
1983	452880080
1984	478008443
1985	456062806
1986	469363259
1987	471284085
1988	474626846
1989	495980335
1990	532343842.56
1991	526293780.79
1992	539767601.04
1993	543543441.3199999
1994	537777193.1400001
1995	567371609.5000001
1996	607816386.23
1997	599196891.4799999
1998	612294128.26
1999	620956798.3399999
2000	579905771.39
2001	573912524.79
2002	577035997.9399999
2003	562471010.7799999
2004	605601948.05
2005	629874341.65
2006	657287972.9799999
2007	670914517.6800001
2008	705890905.9
2009	713825825.25
2010	733940901.86
2011	759509239.45
2012	785314334.1600001
2013	798268171.7399999
2014	801441334.3000001
2015	855355893.4499999
2016	850383947.79
2017	860017018.25
2018	863510426.15
2019	844532442.6800001
2020	848104923.4200001
2021	869272130.5600001
2022	873556477.5900002