Year	metric tons
1961	228822
1962	235838
1963	230178
1964	253631
1965	271200
1966	288100
1967	322000
1968	358400
1969	359483
1970	377739
1971	376284
1972	245162
1973	313877
1974	334885
1975	343959
1976	312921
1977	300313
1978	403198
1979	350011
1980	381765
1981	445682
1982	450643
1983	436724
1984	451171
1985	505722
1986	477546
1987	455113
1988	505590
1989	483941
1990	487787
1991	400558
1992	498180
1993	587701
1994	521084
1995	621528
1996	673859
1997	607607
1998	642120
1999	571751
2000	783484
2001	754945
2002	910681
2003	1002006
2004	798823
2005	963653
2006	894613
2007	864166
2008	783571
2009	914273
2010	969740.12
2011	1009193.66
2012	982568.01
2013	965045.27
2014	838643.21
2015	747920.39
2016	933034.01
2017	909045.22
2018	893458
2019	925610
2020	905198
2021	924130.14
2022	949096.63