Year	metric tons
1961	200670420
1962	217708529
1963	234449945
1964	254368284
1965	258119374
1966	283805824
1967	280541966
1968	291680105
1969	289741673
1970	315655936
1971	326719382
1972	312048347
1973	343536896
1974	355472795
1975	371992218
1976	378827351
1977	368780365
1978	417356304
1979	435019996
1980	419215495
1981	442240519
1982	462327067
1983	516719309
1984	541957375
1985	515812993
1986	528151923
1987	524294310
1988	529399795
1989	551579639
1990	588208810.56
1991	582202570.4200001
1992	593586203.74
1993	597893638.3199999
1994	598838651.51
1995	611069399.57
1996	662495710.6999999
1997	662421916.8499999
1998	669469586.29
1999	681159162.38
2000	641439088.7599999
2001	635369566.04
2002	641967337.3
2003	604428129.3199998
2004	673840633.5799999
2005	690521312.8399998
2006	723237614.52
2007	713261498.8399999
2008	758924896.32
2009	773464680.55
2010	791979510.9699999
2011	824462194.33
2012	854634411.0100001
2013	859972150.8499998
2014	866235752.84
2015	918033856.6699998
2016	911211359.3799998
2017	935199199.6800001
2018	921728454.34
2019	899594259.6300001
2020	899013080.0600001
2021	945205089.78
2022	954138026.88