Year	metric tons
1960	212911
1961	215222
1962	208566
1963	254087
1964	290531
1965	335091
1966	378231
1967	405932
1968	486458
1969	511712
1970	598688
1971	659705
1972	699310
1973	743935
1974	882672
1975	1051521
1976	997135
1977	905055
1978	773807
1979	821169
1980	894563
1981	868837
1982	905346
1983	1057714
1984	1011402
1985	961696
1986	966362
1987	993652
1988	971165
1989	823310
1990	606564
1991	582601
1992	1090077.08
1993	870383.27
1994	811942.01
1995	857425.05
1996	742932
1997	675836.49
1998	597272.0800000001
1999	599622.19
2000	598502.24
2001	659039.12
2002	651892.54
2003	588828.04
2004	626027.12
2005	606182.09
2006	594423.3
2007	663771.08
2008	663200.79
2009	740362.76
2010	679202.3
2011	670760.93
2012	517482.47000000003
2013	593863.49
2014	639018.78
2015	549309.6900000001
2016	620456.3400000001
2017	573273.07
2018	559386.95
2019	568371.72
2020	533718.35
2021	519238.18999999994
2022	506571.1