Year	metric tons
1960	26000
1961	28000
1962	30000
1963	25000
1964	26000
1965	20000
1966	18800
1967	35600
1968	35900
1969	36600
1970	43110
1971	43404
1972	43202
1973	40673
1974	39402
1975	37533
1976	37104
1977	36528
1978	35879
1979	35700
1980	37832
1981	37768
1982	37521
1983	34628
1984	35275
1985	36360
1986	38738
1987	41889
1988	37266
1989	41860
1990	38234
1991	35083
1992	32488
1993	39221
1994	39923
1995	44379
1996	42175
1997	43785
1998	42139
1999	40437
2000	32324
2001	38415
2002	40663
2003	41648
2004	39988
2005	31497
2006	41507
2007	36386
2008	37495
2009	38928
2010	39791
2011	38848
2012	40364
2013	42416
2014	47583
2015	36477
2016	49806
2017	48203
2018	54959
2019	73484.9
2020	73965
2021	74615
2022	76105