Year	metric tons
1960	107396
1961	105537
1962	113061
1963	125912
1964	127114
1965	135820
1966	117494
1967	130574
1968	134509
1969	120173
1970	172272
1971	169483
1972	178191
1973	175653
1974	171622
1975	222588
1976	187850
1977	178207
1978	162833
1979	142448
1980	171931
1981	234185
1982	265146
1983	272772
1984	334173
1985	332371
1986	384869
1987	400149
1988	381279
1989	401703
1990	356943
1991	411151
1992	459230
1993	469355
1994	446842
1995	478661
1996	465722
1997	520032
1998	536165
1999	592128
2000	584495
2001	633408
2002	670945
2003	713769
2004	752588
2005	668507
2006	691596
2007	678531
2008	656875
2009	637152
2010	659040
2011	566998
2012	605296
2013	597026
2014	560921
2015	613476.5
2016	645462.5
2017	631319
2018	662684.35
2019	683342.85
2020	618374.61
2021	651871.12
2022	645286.94