Year	metric tons
1960	12282689.01
1961	14518935
1962	16813703
1963	17213790
1964	20402890
1965	19206137
1966	21208499.009999998
1967	23354347
1968	24905036
1969	23836425
1970	27125843
1971	25932484
1972	21168571
1973	19860904
1974	21866853
1975	20919995
1976	22025204
1977	21324556.990000002
1978	22926894.91
1979	23012560.81
1980	22300605.1
1981	23146706.08
1982	24594971.64
1983	23367820.08
1984	25950319.01
1985	27836432.120000005
1986	31000811.81
1987	31474560.060000002
1988	34188877.92
1989	34842943.4
1990	35326492.84
1991	36602073.080000006
1992	45503841.13
1993	47821694.089999996
1994	52430795.910000004
1995	52921999.37
1996	55888614.180000015
1997	55415530.589999996
1998	52085828.72
1999	56925902.57
2000	59664006.67
2001	57039007.260000005
2002	57542737.94999999
2003	55648628.15
2004	59349331.71
2005	60035821.53000001
2006	58657825.18
2007	59403331.07
2008	59726448.09
2009	59953232.66
2010	58550026.8
2011	62751641.35000001
2012	60888635.85
2013	62338650.280000016
2014	61986273.45999999
2015	63660865.81
2016	63380787.850000024
2017	65400146.980000004
2018	68226862.27
2019	65001563.36999999
2020	63502261.190000005
2021	64992747.94000001
2022	63624084.28999999