Year	metric tons
1960	220684
1961	233396
1962	280611
1963	286731
1964	305153
1965	317854
1966	296396
1967	293454
1968	339359
1969	354561
1970	407410
1971	391880
1972	474329
1973	472817
1974	495698
1975	544898
1976	520364
1977	591456
1978	630744
1979	601919
1980	619601
1981	661714
1982	708585
1983	729656
1984	733099
1985	810998
1986	817002
1987	829424
1988	836086
1989	814406
1990	843238
1991	841818
1992	831967
1993	814210
1994	898147
1995	965933
1996	1002575
1997	1011512
1998	1127988
1999	1152665
2000	1125312
2001	1097428
2002	992284
2003	1049431
2004	999717
2005	982204
2006	1015449.2
2007	1037259.4
2008	949491.7999999999
2009	987270.3999999999
2010	944311.28
2011	925293.99
2012	888026.3200000002
2013	853879.5099999998
2014	905746.52
2015	918638.19
2016	970694.9700000001
2017	1002912.1999999998
2018	1034571.5400000002
2019	979882.3499999997
2020	935034.2899999999
2021	979897.88
2022	967016.85