Year	kilograms per hectare of arable land
1961	11.427289656339935
1962	10.600736846462723
1963	12.062299995949285
1964	9.821184961928934
1965	10.832316954748494
1966	10.506927000076121
1967	16.71174868484871
1968	22.014817795990048
1969	22.626036394960696
1970	35.52141388357087
1971	38.28013229227045
1972	53.34096282674373
1973	52.9726040412998
1974	55.80441630730648
1975	58.47365620010644
1976	69.13722755489923
1977	81.62839917580321
1978	76.62131443789234
1979	79.62140625
1980	88.34603592362193
1981	56.70819685639536
1982	55.088433589018976
1983	45.252211251162514
1984	66.85638607521248
1985	60.54671770220546
1986	75.89682202571727
1987	76.6993547877903
1988	75.21611152581355
1989	69.39167045032401
1990	67.7608787494719
1991	73.2661272876736
1992	78.37075787467028
1993	101.13866224232369
1994	117.00321783332556
1995	98.81587294128704
1996	116.36532220676867
1997	133.5841892170094
1998	132.0968979997291
1999	130.81437899757083
2000	144.51681042070058
2001	148.57142857142858
2002	164.91129586713018
2003	188.76334258886368
2004	229.81928176564205
2005	174.31339457513502
2006	184.57801059001514
2007	233.1424107232978
2008	214.67760102872865
2009	148.486384348785
2010	202.79676529520472
2011	251.42731908432157
2012	230.13247901234567
2013	265.5677821369575
2014	285.06053567121256
2015	234.96508364209987
2016	240.18195085237576
2017	275.9339022990567
2018	290.61783931896787
2019	290.2441005766064
2020	353.4004014903277
2021	369.46747209917606