Year	metric tons
1960	11000
1961	11500
1962	15300
1963	14100
1964	25900
1965	39700
1966	73100
1967	72300
1968	71900
1969	36800
1970	58890
1971	78750
1972	70156
1973	114959
1974	88762
1975	116934
1976	185339
1977	239751
1978	140097
1979	166331
1980	216811
1981	144798
1982	120016
1983	167593
1984	135014
1985	293351
1986	148191
1987	166386
1988	122861
1989	185778
1990	133738
1991	168163
1992	176720
1993	190190
1994	191900
1995	209383
1996	155686
1997	170050
1998	210689
1999	124372
2000	229375
2001	279896
2002	259940
2003	236342
2004	222422
2005	272281
2006	272370
2007	231544
2008	239002
2009	245980.38
2010	188676.53
2011	178610.79
2012	187430.66
2013	219399.56
2014	187746.27
2015	176794.21000000002
2016	188056.97
2017	187040.09999999998
2018	206371.47999999998
2019	267500.70999999996
2020	222368.65
2021	229440.26
2022	198492.19