Year	metric tons
1960	52289
1961	51134
1962	49815
1963	50046
1964	44557
1965	49007
1966	56418
1967	60971
1968	59651
1969	50543
1970	60203
1971	66800
1972	59068
1973	66884
1974	70040
1975	65076
1976	71637
1977	79229
1978	99727
1979	120169
1980	157585
1981	170302
1982	175682
1983	205347
1984	218943
1985	214819
1986	225147
1987	260335
1988	304555
1989	343092
1990	380303
1991	435024
1992	521751
1993	485518
1994	503846
1995	627114
1996	500241
1997	725767
1998	741836.1
1999	691838
2000	639099
2001	645860
2002	675232
2003	635570
2004	638292
2005	650762.01
2006	584322.01
2007	606600.01
2008	564892.3300000001
2009	544720.4
2010	547185.37
2011	547603.99
2012	542091.24
2013	541190.29
2014	552245.57
2015	525087.6
2016	533957.16
2017	547673.14
2018	512559.8
2019	527209.86
2020	483546.03
2021	460346.1
2022	452469.57