Year	metric tons
1960	14247733.01
1961	16374916
1962	18686845
1963	19258787
1964	22652983
1965	21683341
1966	23954037.009999998
1967	26165599
1968	27835837
1969	27037851
1970	30292644
1971	29504235
1972	25065565
1973	23739235
1974	26045990
1975	25383510
1976	26599845
1977	26775684.990000002
1978	29049137.91
1979	29129729.81
1980	28778365.1
1981	29848846.08
1982	31650353.64
1983	30748282.630000003
1984	34367425.41
1985	37143663.230000004
1986	41247035.74
1987	43209510.72
1988	47055898.92
1989	48866121.400000006
1990	49296115.84
1991	52193415.08
1992	64392705.03
1993	70047321.12
1994	77664925.91000001
1995	81565729.37
1996	87138179.78
1997	86840560.59
1998	85688508.61999999
1999	93707896.14000002
2000	98583686.66999999
2001	98096398.76
2002	101516215.21
2003	102498812.75
2004	110410391.31
2005	114405793.45000002
2006	116502609.76
2007	120320016.91
2008	124673906.34
2009	128482912.4
2010	131355942.74000001
2011	138999562.91000003
2012	143177300.51
2013	151646506.15
2014	155747380.89999998
2015	161640374.79000002
2016	165264172.33999997
2017	170511593.20000002
2018	176854327.42000002
2019	177522049.2
2020	179028668.64999995
2021	183585408.67999998
2022	185248295.02999997