Year	metric tons
1960	10000
1961	16200
1962	18300
1963	19600
1964	17700
1965	18600
1966	20200
1967	22100
1968	21100
1969	22000
1970	21700
1971	22300
1972	23800
1973	26400
1974	23600
1975	23000
1976	23300
1977	22800
1978	24950
1979	24460
1980	24775
1981	28570
1982	31820
1983	35300
1984	38490
1985	43696
1986	45498
1987	47748
1988	45732
1989	47150
1990	40630
1991	40289
1992	45910
1993	48022
1994	54612
1995	45692
1996	47709
1997	49395
1998	51291
1999	46700
2000	49080
2001	55331
2002	57211
2003	55440
2004	55418
2005	60421
2006	65485
2007	66221
2008	68898
2009	67664
2010	65145
2011	64481
2012	65170
2013	71946
2014	68660
2015	68130
2016	75150
2017	67921
2018	50850
2019	65477
2020	57805
2021	67459
2022	64262.99