Year	metric tons
1960	330
1961	290
1962	390
1963	450
1964	530
1965	620
1966	630
1967	800
1968	860
1969	950
1970	1040
1971	975
1972	1080
1973	1230
1974	1400
1975	1520
1976	1612
1977	1704
1978	1826
1979	1872
1980	1963
1981	2065
1982	2110
1983	2260
1984	2542
1985	2377
1986	2296
1987	2741
1988	4087
1989	4737
1990	9523
1991	12615
1992	20306
1993	32578
1994	33182
1995	32644
1996	39852
1997	48838
1998	59926
1999	84274
2000	95418
2001	97512
2002	87928
2003	101434
2004	97143
2005	106208
2006	113384
2007	113297
2008	115068
2009	122011
2010	121244
2011	110809.1
2012	110973.47
2013	113999.85
2014	104663
2015	107161.8
2016	123707.1
2017	125524.7
2018	132364.52
2019	128821.58
2020	131737.18
2021	143925.57
2022	142007.58