Year	metric tons
1960	1249343
1961	1094009
1962	1069678
1963	1204810
1964	1386582
1965	1542183
1966	1739905
1967	1765535
1968	1800594
1969	2034538
1970	2034812
1971	2382906
1972	2581660
1973	2457722
1974	2690519
1975	2920565
1976	2970053
1977	3766742
1978	4067098
1979	4072697
1980	4464528
1981	4507693
1982	4811167
1983	5375414
1984	6156328
1985	7049136
1986	7735046
1987	8756826
1988	10131297
1989	11107361
1990	11581756
1991	13264832
1992	16290795
1993	19552116
1994	22974111
1995	26337823
1996	29007308
1997	29401207
1998	31549935
1999	34567571
2000	36676149
2001	38873901.4
2002	41561842.76
2003	44143499.1
2004	48098261.9
2005	51381789.5
2006	54647942.84
2007	57548303.75
2008	61389650.8
2009	64688837.01
2010	68368478.46
2011	71811788.16000001
2012	77592935.03999999
2013	84235920.75999999
2014	88432341.72
2015	92303622.30000001
2016	96182193.26
2017	99451311.99000001
2018	102857152.52
2019	106333599.92999999
2020	109139836.22
2021	111951282.89000005
2022	116150661.47