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	4740
1997	5034
1998	5279
1999	4397
2000	7140
2001	8865
2002	7155
2003	11295
2004	11134
2005	13946
2006	16412
2007	15226
2008	17724
2009	14100
2010	13796
2011	13021
2012	11311
2013	12062
2014	16269.2
2015	15211.8
2016	14523.7
2017	15368.6
2018	14675.3
2019	17152
2020	15109.3
2021	16668.4
2022	18536.85