Year	metric tons
1961	278612
1962	327834
1963	319014
1964	312431
1965	343492
1966	431021
1967	394787
1968	461375
1969	442718
1970	554495
1971	588446
1972	418234
1973	599157
1974	515945
1975	674765
1976	534493
1977	563638
1978	719568
1979	741322
1980	729969
1981	685762
1982	573620
1983	609505
1984	731047
1985	696878
1986	631450
1987	646518
1988	806559
1989	801743
1990	824923
1991	728608
1992	991700
1993	909194
1994	727310
1995	899378
1996	867270
1997	773383
1998	783085
1999	856578
2000	778822
2001	759720
2002	814224
2003	791458
2004	822195
2005	894975
2006	937085
2007	860076
2008	1037707
2009	989851
2010	968601
2011	923938
2012	1090739
2013	1043725
2014	1001957
2015	854471
2016	1072962
2017	1030124.36
2018	817563.23
2019	921410
2020	911983.75
2021	949883.81
2022	953000