Year	metric tons
1960	653304
1961	758089
1962	873257
1963	824828
1964	1017043
1965	1249317
1966	1299007
1967	956279
1968	663196
1969	752953
1970	801903
1971	752275
1972	796455
1973	988230
1974	1018085
1975	1068456
1976	1085164
1977	1474733
1978	1661137
1979	1741593
1980	1608103
1981	1543694
1982	890298
1983	943058.77
1984	1646583
1985	1795775
1986	1769929.39
1987	1771074
1988	1896098
1989	1640847
1990	1890686.04
1991	1380077.1
1992	2484090
1993	2793211
1994	2475071
1995	2467823
1996	2870144
1997	3047125
1998	2620434
1999	2673681
2000	2947369
2001	2909107
2002	3224794
2003	3015290
2004	2753521
2005	2679621
2006	2248645.3
2007	2180973.5
2008	2027791.6
2009	1898138.0999999999
2010	1827492.9499999997
2011	1908041.35
2012	2262941.34
2013	2222038.5999999996
2014	1920326.4699999997
2015	2283800.6499999994
2016	2080659.0899999999
2017	2217177.29
2018	2312977.9499999997
2019	2094299.0800000003
2020	1914023.8699999999
2021	2142923.3499999996
2022	2414384.15