Year	kilograms per hectare of arable land
1961	6.449853372434018
1962	8.631671554252199
1963	10.964327485380117
1964	6.13859649122807
1965	8.969679300291546
1966	10.20058309037901
1967	29.030813953488373
1968	36.8932944606414
1969	24.068023255813955
1970	19.76695652173913
1971	10.635838150289016
1972	24.430547550432276
1973	30.120689655172413
1974	23.312606959498
1975	19.025581395348837
1976	48.44285714285714
1977	52.083636363636366
1978	44.327329192546586
1979	50.22721518987342
1980	47.068093385214006
1981	44
1982	46.425257731958766
1983	47.30769230769231
1984	46.40380952380952
1985	45.49559748427673
1986	46.403115264797506
1987	39.136138613861384
1988	47.26215384615384
1989	46.89071383449147
1990	42.4071072319202
1991	50.24330900243309
1992	59.88977342314758
1993	59.91077119184194
1994	57.37199259716225
1995	64.16772554002542
1996	73.42874922215309
1997	101.05655686761963
1998	100.94319600499375
1999	109.00621118012423
2000	101.73267326732673
2001	233.10066666666665
2002	167.62205882352941
2003	156.82217090069284
2004	217.5293657008614
2005	150.82947530864197
2006	207.78994322789944
2007	199.10627615062762
2008	214.11974110032364
2009	187.27863931965982
2010	252.07097100472015
2011	275.35519598511723
2012	254.74354037808172
2013	236.17098827470693
2014	344.01645360824745
2015	254.81258426966286
2016	345.44522540983615
2017	369.986224588577
2018	428.79865702479344
2019	380.8636905965622
2020	362.8845761078998
2021	367.845888671875