Year	metric tons
1960	33565931.010000005
1961	37104384
1962	40195870
1963	41055913.1
1964	45274572.1
1965	45891141.4
1966	49798178.809999995
1967	52899388
1968	56029941
1969	54237390
1970	59535263
1971	60081853
1972	55652396
1973	55483277
1974	58770352
1975	57653664
1976	61106320
1977	61529272.49
1978	64245986.01
1979	64889874.51
1980	65503272
1981	68035949.03
1982	69945936.74
1983	70800143.87
1984	76920501.88000001
1985	79717675.11
1986	85782025.01000002
1987	87662759.94999999
1988	92578321.16
1989	94303147.19000001
1990	91769338.36000001
1991	93537616.08999999
1992	107635800.32
1993	112408732.5
1994	121443971.52000001
1995	124898523.02000001
1996	129337224.02
1997	129196285.96000001
1998	123663091.11999999
1999	132869687.16
2000	136683410.68
2001	136419305.8
2002	139827520.35
2003	139881279.72
2004	148713937.56
2005	151595247.07
2006	153125714.62
2007	156761180.92000002
2008	159863062.87
2009	162868165.97000003
2010	165002301.49
2011	173042019.61999997
2012	176612340.90999994
2013	184564554.85
2014	189858067.30999994
2015	195335015.23999992
2016	197334941.58
2017	204917734.63
2018	211338084.77
2019	211345160.55
2020	211948517.05999988
2021	216986542.45999998
2022	213618123.49000004