Year	metric tons
1960	184011
1961	185522
1962	180516
1963	226737
1964	264941
1965	297457
1966	334722
1967	338142
1968	406746
1969	407847
1970	469461
1971	517614
1972	544218
1973	578938
1974	679148
1975	801041
1976	751063
1977	663589
1978	581025
1979	599281
1980	640419
1981	623088
1982	609281
1983	740833
1984	720369
1985	678297
1986	645085
1987	672120
1988	653977
1989	565391
1990	474692
1991	458127
1992	511975
1993	414015
1994	462532
1995	454483
1996	370493
1997	377593
1998	271801
1999	269435
2000	253477
2001	260524
2002	256149
2003	215835
2004	227239
2005	193167
2006	181346
2007	187448
2008	179309
2009	260396
2010	220473
2011	227345
2012	230646
2013	249378.13
2014	231707.69
2015	242399
2016	256408
2017	265195.77
2018	266065.33999999997
2019	256162
2020	254090.3
2021	246171.5
2022	224632.94