Year	metric tons
1960	2975
1961	2990
1962	3100
1963	3215
1964	3230
1965	3242
1966	3258
1967	3275
1968	3394
1969	3405
1970	3591
1971	3893
1972	4561
1973	5333
1974	4583
1975	4129
1976	3943
1977	3897
1978	4038
1979	3458
1980	3566
1981	4074
1982	3421
1983	4289
1984	7720
1985	8798
1986	12678
1987	16890
1988	23622
1989	32451
1990	41216
1991	48068
1992	45386
1993	52442
1994	55430
1995	65207
1996	72376
1997	81676
1998	91046
1999	112916
2000	127665
2001	153046
2002	172046
2003	167798
2004	145018
2005	154587
2006	171629
2007	152486
2008	155549
2009	155928
2010	162341
2011	169706
2012	184910
2013	168015
2014	139732
2015	187462
2016	200765
2017	191616
2018	191373
2019	187248
2020	169800
2021	190232
2022	166463