Year	metric tons
1960	13336142.01
1961	15674802
1962	18202842
1963	18799913
1964	22478876
1965	20947010
1966	23731678.009999998
1967	25554050
1968	27554641
1969	26207220
1970	29707176
1971	28868426
1972	23490817
1973	22231762
1974	24772667
1975	23812576
1976	25323088
1977	24659220.990000002
1978	26711148.91
1979	27628253.810000002
1980	27177460.1
1981	28564735.08
1982	30291804.64
1983	29642276.630000003
1984	32767400.110000003
1985	35037334.33
1986	38849920.440000005
1987	38687860.11999999
1988	41690043.81999999
1989	43630421.5
1990	42701132.04
1991	44753886.480000004
1992	54299094.410000004
1993	56084785.06
1994	62523504.519999996
1995	63072240.22
1996	65073452.98000001
1997	63730151.58
1998	57845627.599999994
1999	64354669.20999999
2000	66491213.91
2001	63548512.88000001
2002	64646625.98999999
2003	62307157.690000005
2004	67706434.33
2005	67697383.17000002
2006	65894092.81
2007	66282923.400000006
2008	66366761.67
2009	66686690.16
2010	64390356.099999994
2011	69069149.66000004
2012	66800054.830000006
2013	67650803.17000002
2014	67652903.34999998
2015	68919285.03000002
2016	68458872.94000003
2017	71087746.25000001
2018	73910290.90999998
2019	70924247.94999999
2020	69228611.64
2021	71096825.64000002
2022	69481886.37999997