Year	metric tons
1961	52180873
1962	52239500
1963	55923611
1964	57480720
1965	56559829
1966	53639520
1967	60108518
1968	59331609
1969	62468229
1970	61461782
1971	59227355
1972	57408596
1973	60955133
1974	61376620
1975	66008498
1976	66559734
1977	67333649
1978	69542697
1979	67328152
1980	75603682
1981	77778590
1982	75837008
1983	79218205
1984	75920225
1985	82851020
1986	83524905
1987	81317388
1988	89094904
1989	91496307
1990	88674035.97
1991	91182954.05999999
1992	91883625.21000001
1993	95613786.26
1994	95973547.63999999
1995	100408155.80000001
1996	108005528.17999998
1997	104392839.09
1998	110727374.58999999
1999	119860858.47
2000	120045282.99000001
2001	126347572.94000003
2002	128180587.48
2003	137591254.65
2004	133219391.19000001
2005	151960234.43
2006	158898570.91
2007	167022887.11
2008	176819532.94
2009	184939909.16000003
2010	197585898.25000003
2011	193631540.87
2012	199343557.18
2013	205628275.34000003
2014	215399145.76
2015	209570414.20999995
2016	217261378.96
2017	223097692.91999996
2018	231787976.55999994
2019	227834961.5
2020	238957570.14999998
2021	241321063.22999993
2022	240049409.86