Year	metric tons
1960	1300
1961	1500
1962	1500
1963	1500
1964	1600
1965	1600
1966	1603
1967	1809
1968	1818
1969	1926
1970	1900
1971	2100
1972	2200
1973	2200
1974	2200
1975	2500
1976	2800
1977	3000
1978	3300
1979	3500
1980	3654
1981	3868
1982	4400
1983	4700
1984	4860
1985	9076
1986	9443
1987	10716
1988	12100
1989	12522
1990	14546
1991	15595
1992	16540
1993	16950
1994	17003
1995	21148
1996	21879
1997	23207
1998	24866
1999	25780
2000	31723
2001	33270
2002	35000
2003	36568
2004	39947
2005	42463
2006	45425
2007	46779
2008	48750
2009	48230
2010	49730
2011	52450
2012	56000
2013	57520
2014	64900
2015	69500
2016	70543
2017	77157.1
2018	86864
2019	92252
2020	97822
2021	105291
2022	108385