Year	metric tons
1961	509910
1962	525400
1963	589936
1964	500193
1965	614488
1966	595943
1967	631063
1968	483296
1969	660427
1970	650784
1971	588772
1972	577431
1973	608163
1974	635847
1975	766950
1976	764023
1977	630948
1978	454830
1979	591087
1980	680006
1981	786405
1982	786325
1983	561093
1984	818752
1985	832235
1986	1127492
1987	1296961
1988	1443901
1989	1439532
1990	1382675
1991	1131385
1992	1624244
1993	1893990
1994	2057769.56
1995	1901110
1996	2061846.4
1997	2148137
1998	1485076
1999	1846698
2000	1885187
2001	1644375.35
2002	2057297.52
2003	2055012.78
2004	2607223
2005	2303958
2006	2278620
2007	2726972
2008	2286313.5
2009	2437916.97
2010	2394927.21
2011	2195833.56
2012	2620285.81
2013	2436956.9
2014	2814310.08
2015	3238472.69
2016	2372925.49
2017	2801628.56
2018	2443477.8
2019	2399764.33
2020	2425545.57
2021	2948089.07
2022	2928002.81