Year	metric tons
1960	1617950
1961	1681250
1962	1803360
1963	1800090
1964	2006940
1965	2014120
1966	2142003
1967	2170915
1968	2301074
1969	2486800
1970	2534245
1971	2590234
1972	3049073
1973	3048176
1974	2957651
1975	2593776
1976	2508067
1977	2623083
1978	2614756
1979	2595655
1980	2568017
1981	2624237
1982	2637605
1983	2747084.6900000004
1984	2873740.74
1985	2893616
1986	3068176.3899999997
1987	3158027.12
1988	3228137.9699999997
1989	3332487.69
1990	3451029.3600000003
1991	3522816.77
1992	3692289.7199999997
1993	3799520.0300000003
1994	3796106.3
1995	4053982.41
1996	4055428.05
1997	4463777.49
1998	4565820.49
1999	5106671.149999999
2000	5556061.85
2001	6010774.869999999
2002	6335886.06
2003	6773035.720000001
2004	7380504.37
2005	7761899.590000001
2006	8141327.96
2007	8507290.98
2008	8734089.790000001
2009	9372442.91
2010	9806352.76
2011	10139601.53
2012	10634906.620000001
2013	10964102.200000001
2014	11406163.330000002
2015	11633851.440000001
2016	12073259.990000002
2017	12852274.889999999
2018	12976244.459999999
2019	13256200.14
2020	13335676.149999999
2021	13517361.690000001
2022	13431803.339999996