Year	metric tons
1960	1302215
1961	1148541
1962	1125843
1963	1262765
1964	1446400
1965	1605538
1966	1803501
1967	1831180
1968	1866590
1969	2104555
1970	2107297
1971	2459390
1972	2659319
1973	2538232
1974	2772157
1975	3005535
1976	3059990
1977	3858101
1978	4165279
1979	4176875
1980	4574310
1981	4625362
1982	4936158
1983	5508720
1984	6303837
1985	7211920
1986	7928870
1987	8976945
1988	10364048
1989	11373012
1990	11857354
1991	13592938
1992	16675699.9
1993	19970988.03
1994	23435862
1995	26879158
1996	29628481
1997	30147360
1998	32394498
1999	35468998.019999996
2000	37670076
2001	40035790.4
2002	42925569.76
2003	45650008.1
2004	49821891.6
2005	53213894.92
2006	56694500.88
2007	59711820.93999999
2008	63778476.03999999
2009	67283522.39999999
2010	71413459.69999999
2011	75141591.85
2012	81304892.64
2013	88190916.91
2014	92652632.22
2015	96755994.23000002
2016	100774333.4
2017	104268780.12999998
2018	107911021.72000001
2019	111504251.58000001
2020	114618890.69999999
2021	117596283.09000003
2022	121838248.97999999