Year	metric tons
1961	130000
1962	129150
1963	130080
1964	148680
1965	148278
1966	152037
1967	154700
1968	164900
1969	162233
1970	168887
1971	171722
1972	155486
1973	175827
1974	143009
1975	179475
1976	181600
1977	185500
1978	202042
1979	213400
1980	216600
1981	227000
1982	221000
1983	227000
1984	224000
1985	256000
1986	266000
1987	279300
1988	291700
1989	295900
1990	293300
1991	299800
1992	306100
1993	299700
1994	224724
1995	269037
1996	272649
1997	304757
1998	260539
1999	264518
2000	254735
2001	283645
2002	292395
2003	282588
2004	290589
2005	296951
2006	296904
2007	301452
2008	297923
2009	310262
2010	323180
2011	338093
2012	257030.65
2013	254198.46
2014	236880.85
2015	260287.26
2016	468248.09
2017	375525.86
2018	459945.08
2019	547255.71
2020	465248.57
2021	457949.29
2022	466394