Year	metric tons
1960	879000
1961	1036600
1962	1088300
1963	1195114
1964	1253206
1965	1351309
1966	1369292
1967	1701900
1968	2132600
1969	1887100
1970	1277950
1971	1214550
1972	1188004
1973	1423825
1974	1477296
1975	1413953
1976	1210309
1977	1020512
1978	1039483
1979	1011209
1980	866050
1981	879406
1982	838126
1983	948732
1984	758281
1985	799023
1986	843614
1987	1447221
1988	1324334
1989	889864
1990	549197
1991	512178
1992	705926
1993	574396
1994	532331
1995	585979
1996	453193
1997	530260
1998	579466
1999	609605
2000	667086
2001	785547
2002	797769
2003	847226
2004	917685
2005	831004
2006	635071
2007	696526
2008	661336
2009	528334
2010	645803.6
2011	550307.28
2012	725173.9400000001
2013	437478.77
2014	616469
2015	579065.4
2016	630184.3200000001
2017	536264.08
2018	578377.8200000001
2019	456228.55
2020	613435.48
2021	504475.87
2022	484805.53