Year	metric tons
1961	38144717
1962	39817564
1963	40609284
1964	39114252
1965	39306387
1966	38214092
1967	48604824
1968	41096908
1969	45948673
1970	45887847
1971	50112848
1972	48223896
1973	43575262
1974	56126627
1975	52816993
1976	53015980
1977	54096208
1978	53825440
1979	50906430
1980	56152592
1981	63869000
1982	55329286
1983	50814474
1984	51002427
1985	64165472
1986	68517537
1987	65804093
1988	76367625
1989	77882383
1990	70335878.05
1991	75659280.89999999
1992	66363463.92
1993	79067418.59
1994	83172191.04000002
1995	77368980.89000002
1996	89738572.07999998
1997	85086956.57000002
1998	85800424.06
1999	86372614.72
2000	86736694.94
2001	88955937.15
2002	90986682.76
2003	97209504.47
2004	97705843.23999998
2005	109177085.9
2006	111978666.32
2007	110637623.68
2008	123684051.69999999
2009	119052315.11999999
2010	135282183.92
2011	127176472.71999998
2012	136711917.04999998
2013	138219565.6
2014	155667333.76
2015	147519045.78
2016	157415230.02
2017	169039862.35000005
2018	174135399.87999997
2019	167105490.82000005
2020	181786539.72
2021	183467643.57
2022	184053909.75