Year	metric tons
1960	8500
1961	11500
1962	11900
1963	10000
1964	10000
1965	9000
1966	9000
1967	9000
1968	8500
1969	8500
1970	8500
1971	9300
1972	9500
1973	9600
1974	10100
1975	10100
1976	10130
1977	10109
1978	9797
1979	9851
1980	9250
1981	8050
1982	8200
1983	8961
1984	9965
1985	10731
1986	11275
1987	11170
1988	14652
1989	16160
1990	17054
1991	18390
1992	22340
1993	26340
1994	28717
1995	28300
1996	27755
1997	23485
1998	20956
1999	21414
2000	10052
2001	18831
2002	21047
2003	15456
2004	17971
2005	18771
2006	25727
2007	22019
2008	19010
2009	21343
2010	19347
2011	19155
2012	16039.05
2013	19191.9
2014	16085
2015	17632
2016	18259
2017	20614
2018	16966.63
2019	14636.45
2020	13801.67
2021	14115.2
2022	13474.49