Year	metric tons
1960	2013
1961	1700
1962	1500
1963	1400
1964	1600
1965	2924
1966	3324
1967	4236
1968	5560
1969	6500
1970	5500
1971	5600
1972	2549
1973	2975
1974	4769
1975	4949
1976	4059
1977	2046
1978	4355
1979	4500
1980	12752
1981	13130
1982	14706
1983	10122
1984	11979.78
1985	15900.6
1986	17947
1987	18622
1988	21690
1989	22058
1990	24804
1991	26106
1992	28908
1993	31103
1994	33518
1995	34448
1996	36024
1997	36925
1998	37959
1999	43643
2000	50009
2001	47336
2002	44053
2003	41994
2004	40190
2005	37783
2006	35040
2007	32166
2008	47760
2009	52227.3
2010	50116
2011	30014
2012	34664
2013	35514
2014	24643
2015	25740
2016	29929.39
2017	31883.99
2018	32154.06
2019	32345
2020	31813.55
2021	31961.33
2022	32595