Year	metric tons
1961	44237538
1962	45075048
1963	50031359
1964	55996314
1965	53901419
1966	55440790
1967	60486622
1968	58134494
1969	60859309
1970	67282831
1971	68501707
1972	64493499
1973	71415129
1974	74169667
1975	76241439
1976	83041527
1977	81618659
1978	81524361
1979	78991433
1980	83699442
1981	98728962
1982	100674802
1983	95208014
1984	101114079
1985	104214890
1986	99056862
1987	104909746
1988	100860826
1989	98583208
1990	91580450
1991	96747316.94999999
1992	110879889.32
1993	108621939.55999999
1994	111474221.6
1995	117892053.25999999
1996	111733602.85000002
1997	125615968.43000002
1998	125101232.61000001
1999	123478233.94000001
2000	129518267.52
2001	142652848.34000003
2002	133258817.48
2003	151175946.32999998
2004	150028610.76000002
2005	146739968.07999998
2006	144222834.67
2007	167998899.93
2008	184357810.58
2009	152710929.91000003
2010	174958357.74000004
2011	182279143.72
2012	197127002.66000006
2013	212863290.40000004
2014	215187482.43000004
2015	226037815.14
2016	212981718.08999997
2017	260973057.76000002
2018	239827109.5
2019	270876886.79
2020	278349342.17999995
2021	266909051.67999998
2022	294166349.0000001