Year	metric tons
1961	133290
1962	241286
1963	138927
1964	171009
1965	177702
1966	195570
1967	202304
1968	167606
1969	170692
1970	224801
1971	202435
1972	200886
1973	204248
1974	191488
1975	219392
1976	234042
1977	251013
1978	268321
1979	254496
1980	272570
1981	286273
1982	315917
1983	310385
1984	296475
1985	336601
1986	297331
1987	292285
1988	291592
1989	261500
1990	264908
1991	340704.78
1992	239687.4
1993	233498.11
1994	130072.51
1995	142395.7
1996	183428.88
1997	223433
1998	194226
1999	179004
2000	239705
2001	284708.4
2002	308447
2003	297669
2004	318944
2005	413314
2006	370523
2007	356292
2008	406100
2009	557568.47
2010	676547.9
2011	775438.56
2012	808340.12
2013	932107.27
2014	582270
2015	612865
2016	662566.51
2017	685611.43
2018	711445.6
2019	732107.12
2020	751906.56
2021	809832
2022	807219.18