Year	kilograms per hectare of arable land
1961	152.72283576772355
1962	155.24954922466642
1963	162.70408163265307
1964	174.33859134262656
1965	183.2996658002228
1966	194.60461653015636
1967	195.94785847299815
1968	205.35671863400148
1969	216.4499626587005
1970	224.61142427658774
1971	238.93804306762374
1972	255.2610335722369
1973	277.4802110817942
1974	217.4149943203332
1975	241.15132075471698
1976	245.21979676326686
1977	262.2184300341297
1978	260.3465758607643
1979	264.1018168054504
1980	237.69382341796134
1981	234.2313234736443
1982	248.15817490494297
1983	267.76128037022755
1984	252.42228177641653
1985	243.59515570934255
1986	247.53045489591364
1987	234.98836307214896
1988	241.015625
1989	255.6385068762279
1990	247.24716907458026
1991	227.86499215070643
1992	199.68491532099253
1993	190.68298460323726
1994	197.0401691331924
1995	188.8745148771022
1996	193.36778639104222
1997	184.77801268498942
1998	174.13355874894336
1999	163.46992153443767
2000	153.00306882946077
2001	134.6719022687609
2002	128.87434094903338
2003	138.18005295675198
2004	144.78448655795503
2005	137.1170668953688
2006	138.5811674478057
2007	142.4119687771032
2008	147.67610324729392
2009	102.91814068284657
2010	113.7121024370095
2011	112.84873949579831
2012	107.11331679073615
2013	116.62277787007808
2014	123.5657894736842
2015	136.88042996175878
2016	139.14199114110946
2017	163.16643997634534
2018	134.8361497236644
2019	136.08285210097782
2020	144.9817666485303
2021	132.62162918964785