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	4
1972	13
1973	18
1974	31
1975	48
1976	66
1977	91
1978	123
1979	165
1980	224
1981	300
1982	400
1983	535
1984	775
1985	921
1986	1171
1987	1618
1988	3314
1989	5673
1990	10455
1991	12267
1992	23987
1993	23971
1994	25652
1995	36630
1996	29990
1997	43710
1998	45933
1999	52947
2000	61786
2001	57660
2002	57160
2003	60895
2004	60072
2005	61000
2006	70132
2007	66565
2008	68200
2009	80623
2010	80367
2011	83681
2012	89654
2013	89398
2014	92002
2015	95857
2016	106685
2017	118485
2018	132756.22
2019	171025.45
2020	179350.99
2021	192521.03
2022	204941.99