Year	metric tons
1960	62600
1961	61200
1962	64500
1963	69600
1964	70500
1965	76300
1966	83300
1967	99600
1968	108400
1969	125300
1970	129000
1971	137000
1972	166000
1973	169500
1974	167500
1975	188000
1976	152400
1977	219220
1978	223830
1979	179930
1980	165840
1981	166590
1982	170035
1983	172000
1984	212300
1985	160800
1986	197600
1987	200000
1988	214291
1989	212205
1990	245223
1991	214570
1992	264900
1993	219814
1994	213129
1995	208789
1996	195088
1997	218026
1998	220628
1999	226097
2000	219356
2001	220726
2002	221898
2003	241810
2004	371789
2005	416758
2006	367099
2007	431500
2008	403500
2009	412000
2010	413805
2011	437415
2012	407638
2013	419249
2014	461196
2015	396205
2016	381803
2017	389629
2018	439354
2019	603224
2020	578684
2021	634594.96
2022	444935