Year	metric tons
1960	13600
1961	14300
1962	19500
1963	21700
1964	21200
1965	33900
1966	32500
1967	29300
1968	32900
1969	38200
1970	47000
1971	60000
1972	70000
1973	69300
1974	70277
1975	70992
1976	74900
1977	68200
1978	67800
1979	60002
1980	65764
1981	51401
1982	58429
1983	67006
1984	65068
1985	62072
1986	72858
1987	88596
1988	78817
1989	70771
1990	74100
1991	63729
1992	69484
1993	68206
1994	58804
1995	53890
1996	63809
1997	56571
1998	41340
1999	45982
2000	50530
2001	41187
2002	41971
2003	54209
2004	57196
2005	60407
2006	74287
2007	68000
2008	71719
2009	70945
2010	100929
2011	85248
2012	128624
2013	115953
2014	120870.56
2015	146617
2016	160498.39
2017	211671.8
2018	230863
2019	163184
2020	180508.22
2021	180508
2022	194013.36