Year	metric tons
1960	928067
1961	1033880
1962	1120287
1963	1209942
1964	1210086
1965	1239471
1966	1355424
1967	1293080
1968	1492496
1969	1401459
1970	1392498
1971	1313756
1972	1170094
1973	1163762
1974	1041273
1975	1027771
1976	1130492
1977	1267970
1978	1404112
1979	1446984
1980	1373359
1981	1444327
1982	1427021
1983	1371030
1984	1304529
1985	1473990
1986	1531719
1987	1615083
1988	1704410
1989	1649945
1990	1685532
1991	1500398
1992	1330490
1993	1162259
1994	1057094
1995	880353
1996	925943
1997	1001276
1998	1031373
1999	1047330
2000	1032686
2001	1076924
2002	1105841
2003	1153788
2004	1213644
2005	1145594
2006	1122606
2007	1044982
2008	967874
2009	993173
2010	975764
2011	939688.33
2012	834404.23
2013	893000.03
2014	884382.5
2015	871148.2
2016	886758.97
2017	854100.16
2018	854090.69
2019	853387.66
2020	765345.97
2021	754137.17
2022	704176.83