Year	metric tons
1960	216754
1961	245206
1962	223613
1963	234953
1964	327089
1965	356354
1966	372164
1967	375547
1968	366613
1969	372627
1970	417749
1971	426440
1972	439063
1973	424389
1974	468486
1975	450191
1976	471500
1977	423787
1978	451257.4
1979	482593.4
1980	504905.5
1981	513736.09
1982	536817.6599999999
1983	543955.48
1984	580930.73
1985	586603.23
1986	564362.4299999999
1987	554302.6799999999
1988	570639.38
1989	548778.3
1990	530676.1699999999
1991	586520.15
1992	566844.5
1993	563862.4
1994	575759.8
1995	612607.1
1996	557127.5
1997	541368.6
1998	517109.7
1999	495190.35
2000	520681.85
2001	530738.7
2002	456187.1
2003	489584.8
2004	407156.8
2005	481027.1
2006	491438.7
2007	470605.45
2008	386622.26
2009	416951.5
2010	388454.20999999996
2011	381980.41000000003
2012	339471.39
2013	318794.51
2014	332181.76
2015	347531.31
2016	353550.86
2017	354014.39
2018	351936.88
2019	318456.33999999997
2020	266967.25
2021	297590.87
2022	276306.43