Year	metric tons
1960	2005
1961	2173
1962	2361
1963	2547
1964	2730
1965	2904
1966	3088
1967	3275
1968	3454
1969	3659
1970	4003
1971	4215
1972	4525
1973	4775
1974	4909
1975	5130
1976	5402
1977	5748
1978	5999
1979	6234
1980	6588
1981	6878
1982	7250
1983	7618
1984	7827
1985	8933
1986	6572
1987	7103
1988	11857
1989	26943
1990	8425
1991	16565
1992	18654
1993	18757
1994	16440
1995	18244
1996	21783
1997	25696
1998	23779
1999	26917
2000	32940
2001	32564
2002	39341
2003	34395
2004	47659
2005	60807
2006	90503
2007	92700
2008	153283
2009	165031
2010	217096.6
2011	248594.87000000002
2012	289516.8
2013	321637.85
2014	363662
2015	377825.16000000003
2016	379237.63
2017	374719.26
2018	393508.74
2019	372606.3
2020	357297.64999999997
2021	400390.5
2022	429821.69999999995