Year	metric tons
1961	116542307
1962	115643722
1963	121364901
1964	125333492
1965	111443820
1966	109623410
1967	128794966
1968	139109563
1969	145038515
1970	151750391
1971	147983606
1972	144381020
1973	159868749
1974	146310232
1975	169945443
1976	163603649
1977	182498369
1978	187826396
1979	171949768
1980	189455094
1981	197653453
1982	185821012
1983	219474770
1984	215643920
1985	218001227
1986	219973953
1987	209317040
1988	238479827
1989	259019537
1990	253875462
1991	252699182.8
1992	262866323.04
1993	271565043.63
1994	272650648.14
1995	275204491.6
1996	285577412.5
1997	290696289.82
1998	299738665.04999995
1999	313638521.96
2000	316901490.46
2001	320080298.32
2002	287090414.84000003
2003	320855678.82
2004	311886354
2005	331258371
2006	333212295
2007	358264729
2008	367745458
2009	356734624.53
2010	373291384.77
2011	397924028.94
2012	402282177.49
2013	411040331.19000006
2014	414363294.93
2015	402531068.87
2016	412279340.34
2017	431726485.52000004
2018	442769756.23
2019	449337648.71000004
2020	472084110.65
2021	489311633.05
2022	485032847.52