Year	metric tons
1960	33800
1961	36500
1962	45700
1963	59800
1964	76600
1965	76500
1966	85696
1967	98990
1968	74080
1969	130954
1970	171517
1971	232662
1972	281189
1973	221664
1974	219146
1975	261391
1976	246601
1977	271933
1978	274631
1979	236979
1980	231566
1981	240510
1982	244163
1983	251503
1984	269563
1985	276216
1986	319818
1987	381814
1988	362050
1989	361675
1990	395872
1991	362538
1992	423425
1993	372619
1994	335437
1995	352844
1996	476744
1997	447127
1998	445541
1999	496770
2000	454346
2001	450353
2002	375182
2003	393547
2004	420443.4
2005	381637.89
2006	378642.99
2007	331175.01
2008	342518.14
2009	304584
2010	351458.65
2011	349760.3
2012	356346.57
2013	289884.74
2014	323425.15
2015	344060.91
2016	323916.57
2017	367767.76
2018	358743.37
2019	317305.72
2020	370686.15
2021	392761.55
2022	519627.27