Year	metric tons
1961	117230867
1962	126337391
1963	125983627
1964	131040517
1965	137344739
1966	136681796
1967	152174823
1968	156211134
1969	157839639
1970	147989009
1971	174813708
1972	179786473
1973	180306350
1974	187879069
1975	178266431
1976	177580528
1977	182947776
1978	203486622
1979	192541222
1980	207459386
1981	194707415
1982	213710109
1983	202648176
1984	242562515
1985	227675171
1986	223048122
1987	221541169
1988	232362147
1989	235803954
1990	229685935.8
1991	244372749.24
1992	212776801.87
1993	229548675.53
1994	229377560.77000004
1995	236036962.34000003
1996	253207419.85999998
1997	268998310.13
1998	267022029.54999998
1999	254714832.15
2000	256044370.01000002
2001	268748933.66999996
2002	269371969.67
2003	232621590.27
2004	306271155.44
2005	269828444.97
2006	252215990.85
2007	246391408.72
2008	296193332.14000005
2009	280518297.11
2010	263420029.96000004
2011	273333535.96
2012	265402639.41999996
2013	289480200.46000004
2014	309340290.39000005
2015	293917753.28
2016	280777758.92999995
2017	288817332.77
2018	273938220
2019	299262180
2020	285523150
2021	297504860
2022	270830120