Year	kilograms per hectare of arable land
1961	90.67024430517506
1962	88.06128923892352
1963	106.02893711741793
1964	120.74402125775022
1965	128.08197022606137
1966	126.88849052462135
1967	134.74547841306884
1968	152.1277913372919
1969	178.46831322994447
1970	188.82131198507696
1971	198.23872762173386
1972	205.09400251756202
1973	232.8613702683819
1974	242.00417109675308
1975	210.77290154172445
1976	171.32255574962429
1977	181.21185809972712
1978	195.78150284220573
1979	204.12544280058344
1980	206.406078514141
1981	194.89692693501084
1982	226.78496150040866
1983	225.83715497101323
1984	215.4373935450059
1985	219.1309126077018
1986	225.31155956806515
1987	228.9040014040014
1988	219.3144586894587
1989	227.96478966691734
1990	195.09453920401958
1991	147.43227377484018
1992	151.04184906321134
1993	149.73853049745122
1994	154.41361916771754
1995	158.98763704222065
1996	147.40510502025055
1997	147.72299585999247
1998	142.58028792912515
1999	142.3912544210188
2000	136.64823362734793
2001	135.41239228559704
2002	129.42859734252414
2003	126.60402927093685
2004	126.15571666591616
2005	121.37894030851777
2006	113.93762441937625
2007	106.77405060486551
2008	95.93864813421274
2009	76.77323650533587
2010	100.53707645910946
2011	86.18618084870029
2012	86.23982926503935
2013	87.35246166988894
2014	92.74410973641743
2015	89.20436159300718
2016	86.16286286731967
2017	89.53851917930419
2018	91.66027641551493
2019	95.28061915367483
2020	92.7918457423094
2021	98.08426214890771