Year	metric tons
1960	1566799
1961	1452098
1962	1466861
1963	1683131
1964	1832605
1965	1998775
1966	2244844
1967	2337102
1968	2451890
1969	2615775
1970	2749797
1971	3192508
1972	3442637
1973	3592384
1974	3994769
1975	4142412
1976	4339126
1977	5232586.5
1978	5527637
1979	5611125
1980	6159881
1981	6350455
1982	6548808
1983	7319574.5
1984	8243774.45
1985	9212426.66
1986	10227915.09
1987	11245675.23
1988	12687779.96
1989	13496780.06
1990	13661964.04
1991	15084800.6
1992	18036081.89
1993	21465491.05
1994	24543361
1995	27555654.2
1996	29850396.13
1997	29870752.700000003
1998	31579621.1
1999	34341941.61
2000	36252249.75
2001	38123364.72
2002	40939355
2003	43278279.02
2004	46745111.8
2005	49827134.089999996
2006	52931610.93
2007	56029591.129999995
2008	58889998.45999999
2009	62190499.35
2010	65745099.760000005
2011	68727275.65
2012	73957397.63999999
2013	80214233.07000004
2014	83700667.24
2015	87384278.42000002
2016	90804004.46
2017	93727117.65
2018	95723688.61
2019	98016929.46000001
2020	99957970.96000001
2021	101976186.84
2022	102115646.48999998