Year	kilograms per hectare of arable land
1961	113.91509433962264
1962	107.56957928802589
1963	106.94375
1964	115.21739130434783
1965	128.84615384615384
1966	123.61801242236025
1967	144.19504643962847
1968	142.5310559006211
1969	165.46728971962617
1970	176.35384615384615
1971	186.15030674846625
1972	192.87692307692308
1973	170.01497005988023
1974	190.38053097345133
1975	221.99404761904762
1976	227.4276923076923
1977	245.52307692307693
1978	257.4153846153846
1979	239.51384615384615
1980	243.8523076923077
1981	231.96923076923076
1982	252.87692307692308
1983	265.6825396825397
1984	292.6829268292683
1985	281.651376146789
1986	277.2189349112426
1987	289.08554572271385
1988	287.6106194690266
1989	294.08284023668637
1990	299.1253644314869
1991	269.7406340057637
1992	281.8443804034582
1993	282.4207492795389
1994	297.9942693409742
1995	301.4492753623188
1996	354.1666666666667
1997	357.14285714285717
1998	361.1940298507463
1999	267.26726726726724
2000	278.1065088757396
2001	261.4035087719298
2002	251.8624641833811
2003	282.9341317365269
2004	320.9003215434084
2005	292.60450160771705
2006	304.9504950495049
2007	344.9967298888162
2008	280.61394728061396
2009	200.46007229707524
2010	206.4032697547684
2011	251.60635779506256
2012	278.8331071913162
2013	296.0111966410077
2014	264.2262895174709
2015	243.60699865410498
2016	280.6779661016949
2017	229.84912144702844
2018	240.67796610169492
2019	231.4761375661376
2020	239.15
2021	265.37931034482756