Year	metric tons
1960	65500
1961	67000
1962	64900
1963	80500
1964	62900
1965	73200
1966	70800
1967	73700
1968	92200
1969	86500
1970	80700
1971	90200
1972	87600
1973	98800
1974	109978
1975	109536
1976	116959
1977	115331
1978	135711
1979	130397
1980	159979
1981	149396
1982	157618
1983	167447
1984	169308
1985	169022
1986	156424
1987	153500
1988	159264
1989	146558
1990	132985
1991	119320
1992	151753
1993	156297
1994	164269
1995	167485
1996	179079
1997	180100
1998	171689
1999	160568
2000	156428
2001	149977
2002	142302
2003	121874
2004	135422
2005	131733
2006	149446
2007	164677
2008	148666
2009	154626
2010	156097
2011	153702
2012	162321
2013	167787
2014	182956
2015	182865
2016	192881
2017	190625
2018	175200.39
2019	163917.29
2020	148569
2021	133282
2022	122684