Year	metric tons
1961	91000
1962	93200
1963	94595
1964	95000
1965	104750
1966	95100
1967	96530
1968	99964
1969	114957
1970	88630
1971	55590
1972	43900
1973	29800
1974	55310
1975	51660
1976	44890
1977	29100
1978	39430
1979	37700
1980	47230
1981	59600
1982	61620
1983	47640
1984	51840
1985	107850
1986	126850
1987	151790
1988	174256
1989	183734
1990	103443
1991	105125
1992	106573
1993	168682
1994	206867.73
1995	221643.67
1996	234354.74
1997	153762
1998	189507.46
1999	193940.37
2000	179686.96
2001	124159.18
2002	112767
2003	180350
2004	115017
2005	170771
2006	167333
2007	182406
2008	189537
2009	170503
2010	278473.41
2011	199092.35
2012	343848.35
2013	311756.02
2014	373295
2015	315852.29
2016	308750
2017	375033.3
2018	433922.22
2019	352620.18
2020	411062.11
2021	500857.38
2022	555394.91