Year	metric tons
1960	250052
1961	268924
1962	294728
1963	342638
1964	377947
1965	370618
1966	320568
1967	341765
1968	319079
1969	269902
1970	286042
1971	229693
1972	218349
1973	220471
1974	205540
1975	207282
1976	205299
1977	182864
1978	185577
1979	198202
1980	233516
1981	257325
1982	255840
1983	261717
1984	274618
1985	239718
1986	215309
1987	214412
1988	250963
1989	257697
1990	260106
1991	245001
1992	314664
1993	347801
1994	394224
1995	412127
1996	379142
1997	364066
1998	416363
1999	357260
2000	343368
2001	318590
2002	300582
2003	293209
2004	275919
2005	262239
2006	276800
2007	243618
2008	238931
2009	211955
2010	222679
2011	194762
2012	165366
2013	202317
2014	194473
2015	223983
2016	221212
2017	243519
2018	234757
2019	195916.3
2020	191833.09999999998
2021	182769.32
2022	163355.28