Year	metric tons
1960	0
1961	0
1962	0
1963	0
1964	0
1965	0
1966	0
1967	0
1968	0
1969	0
1970	0
1971	0
1972	0
1973	0
1974	0
1975	0
1976	0
1977	0
1978	0
1979	0
1980	0
1981	0
1982	0
1983	0
1984	0
1985	0
1986	0
1987	0
1988	0
1989	0
1990	0
1991	0
1992	157388
1993	142313
1994	138665
1995	149719
1996	143024
1997	106027
1998	102756
1999	125857
2000	136728
2001	128639
2002	117983
2003	115180
2004	125936
2005	151160
2006	140954
2007	156005
2008	158518
2009	163730.2
2010	165367.8
2011	154855.5
2012	94978.54
2013	116672.21
2014	120222.28
2015	82202.85
2016	115066.09
2017	70219.54000000001
2018	73973.66
2019	71993.64
2020	65706.45
2021	62559.51
2022	62377.91