Year	metric tons
1960	800
1961	800
1962	1000
1963	1000
1964	1000
1965	1300
1966	1300
1967	1500
1968	1500
1969	1500
1970	1500
1971	1500
1972	2000
1973	2200
1974	2047
1975	1989
1976	2400
1977	2433
1978	2200
1979	2200
1980	2178
1981	2604
1982	2331
1983	2114
1984	3173
1985	2484
1986	1980
1987	2678
1988	3086
1989	4374
1990	5702
1991	8136
1992	7845
1993	6994
1994	5086
1995	4271
1996	4739
1997	5032
1998	5279
1999	4397
2000	7140
2001	8864
2002	7155
2003	11295
2004	11134
2005	13935
2006	16376
2007	15190
2008	17688
2009	14064
2010	13760
2011	12985
2012	11275
2013	12006
2014	16213.2
2015	15201.8
2016	14513.7
2017	15358.6
2018	14665.3
2019	17130
2020	15086.5
2021	16554.5
2022	18439