Year	metric tons
1960	7300
1961	8000
1962	8200
1963	8400
1964	9200
1965	9600
1966	10600
1967	9900
1968	10200
1969	10300
1970	11100
1971	10700
1972	10400
1973	12400
1974	9654
1975	8730
1976	7201
1977	6368
1978	9540
1979	12738
1980	13958
1981	20770
1982	12916
1983	7603
1984	12179
1985	15422
1986	19686
1987	20744
1988	11015
1989	9926
1990	8527
1991	11210
1992	12076
1993	12451
1994	13559
1995	15072
1996	14433
1997	11897
1998	10978
1999	9915
2000	9590
2001	19609
2002	35943
2003	35484
2004	42415
2005	41114
2006	43218
2007	54664
2008	53287
2009	48424
2010	39583
2011	54403
2012	52060
2013	52147
2014	63296
2015	54513
2016	58558.09
2017	59600.34
2018	57131.44
2019	51648.69
2020	59674.39
2021	59019.89
2022	60114.99