Year	metric tons
1961	62161
1962	16900
1963	18550
1964	11506
1965	11599
1966	35466
1967	65529
1968	25943
1969	50075
1970	11530
1971	96400
1972	79500
1973	34517
1974	110750
1975	67050
1976	123147
1977	73600
1978	34200
1979	9750
1980	45900
1981	54195
1982	19320
1983	16765
1984	9525
1985	20670
1986	23500
1987	24275
1988	108280
1989	77275
1990	54430
1991	52300
1992	22500
1993	46375.59
1994	55405.27
1995	62769.17
1996	89530.31
1997	43946.35
1998	14934
1999	20827.3
2000	24576.15
2001	23080
2002	34479.21
2003	35885.13
2004	26672.45
2005	36512.9
2006	43809.86
2007	31312
2008	36741.01
2009	55377.58
2010	50345
2011	74024
2012	37457
2013	19366
2014	50253.48
2015	43967.04
2016	47045.26
2017	23207.96
2018	80922.63
2019	48494.82
2020	162134.98
2021	122114.18
2022	85049.21