Year	metric tons
1961	23550
1962	23265
1963	22807
1964	19034
1965	15406
1966	15431
1967	17751
1968	24652
1969	21735
1970	23921
1971	21453
1972	19836
1973	19132
1974	19540
1975	25080
1976	26197
1977	25344
1978	25363
1979	30741
1980	33802
1981	32974
1982	32530
1983	28082
1984	32020
1985	35910
1986	33419
1987	24993
1988	34251
1989	33282
1990	31757.92
1991	32855.5
1992	26782.379999999997
1993	26162.839999999997
1994	22945.100000000002
1995	23228.89
1996	22883.28
1997	21325.159999999996
1998	8580.390000000001
1999	22175.560000000005
2000	19593.329999999998
2001	17877.05
2002	16691.26
2003	19409.88
2004	17857.17
2005	19891.26
2006	17878.57
2007	18973
2008	16046.42
2009	15667.869999999999
2010	12277.75
2011	11984.41
2012	8663.25
2013	11688.02
2014	11766.68
2015	11312.62
2016	13445.84
2017	14000.31
2018	12243.009999999998
2019	11972.769999999999
2020	14533.900000000001
2021	15786.999999999998
2022	18664.039999999997