Year	metric tons
1961	317110594
1962	344102156
1963	358784212
1964	348254548
1965	374327481
1966	387592589
1967	414199249
1968	423534892
1969	424602517
1970	389435777
1971	470909367
1972	457785804
1973	477193397
1974	445855781
1975	489488152
1976	497911580
1977	512790112
1978	553184475
1979	563361955
1980	537860446
1981	607274142
1982	619075996
1983	494816848
1984	637856794
1985	653834655
1986	625439804
1987	576867158
1988	498008176
1989	592981119
1990	624386644.8
1991	599289810.99
1992	690275413.16
1993	610050222.25
1994	698770358.63
1995	611088556
1996	708126345.3
1997	726551271.9900001
1998	725979804.0900002
1999	703359928.38
2000	723987113.04
2001	707037330.4899998
2002	684387389.4499999
2003	681311997.9699999
2004	820583559.5
2005	756451515.7399999
2006	718634409.11
2007	763374949.4800001
2008	838026300.15
2009	829191154
2010	782279238.45
2011	799392063.8799999
2012	764077826.2599999
2013	881112207.1300001
2014	897972898.23
2015	874103024.49
2016	933725992.1999999
2017	880711859.5899999
2018	857771600.1299999
2019	870447662.73
2020	860008665.2899998
2021	911816642.39
2022	845048898.6899999