Year	metric tons
1961	293932
1962	313508
1963	293449
1964	350144
1965	335293
1966	433094
1967	487464
1968	502090
1969	528519
1970	538749
1971	547485
1972	585830
1973	625498
1974	646200
1975	666500
1976	857000
1977	910400
1978	932800
1979	963800
1980	880600
1981	904200
1982	970400
1983	1067000
1984	1039400
1985	994900
1986	1046000
1987	1025800
1988	997630
1989	1033350
1990	897000
1991	446152
1992	428918.16
1993	665720
1994	646026
1995	645400
1996	503714
1997	602043
1998	605746
1999	497500
2000	565800
2001	502500
2002	518800
2003	488500
2004	498800
2005	511200
2006	507500
2007	493600
2008	608500
2009	630900
2010	693800
2011	701200
2012	697400
2013	702870
2014	700370
2015	695000
2016	698430
2017	701734
2018	678196
2019	666065
2020	684023
2021	691126.7
2022	690850