Year	metric tons
1960	7800
1961	7200
1962	8600
1963	6700
1964	9600
1965	16083
1966	22975
1967	38081
1968	55584
1969	78673
1970	88601
1971	95404
1972	106417
1973	97110
1974	112759
1975	151933
1976	160894
1977	129863
1978	91261
1979	76065
1980	113687
1981	93953
1982	100982
1983	108207
1984	100996
1985	89663
1986	97314
1987	99005
1988	105877
1989	91351
1990	49254
1991	50056
1992	24016
1993	13658
1994	6585
1995	8012
1996	8854
1997	11237
1998	18946
1999	10556
2000	8663
2001	8674
2002	15008
2003	12035
2004	8252
2005	5434
2006	7544
2007	8903
2008	8864
2009	8978
2010	10769
2011	9623.26
2012	9581.1
2013	9669.93
2014	8687.39
2015	8828.73
2016	8614.22
2017	8559.04
2018	8598.91
2019	10329.65
2020	6295.8
2021	9009.27
2022	5594.38