Year	metric tons
1960	1079591
1961	914375
1962	883466
1963	1007663
1964	1176341
1965	1322423
1966	1508348
1967	1519220
1968	1509920
1969	1729303
1970	1711576
1971	2032908
1972	2199205
1973	2048639
1974	2224175
1975	2435782
1976	2439724
1977	3183986
1978	3391387
1979	3320885
1980	3594546
1981	3559048
1982	3745109
1983	4193658
1984	4869233
1985	5662592
1986	6316298
1987	7131724
1988	8300854
1989	9103113
1990	9518473
1991	10937780
1992	13660876.9
1993	16838598.03
1994	19883532
1995	22964754
1996	25430281
1997	25670089
1998	27700737
1999	30362339.02
2000	32248928
2001	33810435
2002	36164151
2003	38200131
2004	40998243.7
2005	43570044.5
2006	46051019.28
2007	48429396.04
2008	50840757.15
2009	53990941.23
2010	57396867.73
2011	60366722.32
2012	65242993.58
2013	71574530.4
2014	75053789.07999998
2015	78451484.75000001
2016	81758564.13
2017	84000534.32
2018	85655808.3
2019	88012270.02
2020	89759485.30999999
2021	91868393.98
2022	95190351.62