Year	kilograms per hectare of arable land
1961	11.415525114155251
1962	22.831050228310502
1963	22.831050228310502
1964	25.114155251141554
1965	18.264840182648403
1966	22.831050228310502
1967	18.433179723502302
1968	39.1705069124424
1969	44.675925925925924
1970	48.611111111111114
1971	54.4537037037037
1972	60.40277777777778
1973	51.629629629629626
1974	64.01616628175519
1975	58.8337182448037
1976	52.42494226327945
1977	52.30414746543779
1978	52.995391705069125
1979	68.66359447004608
1980	70.34482758620689
1981	68.63636363636364
1982	60.666666666666664
1983	50.76923076923077
1984	61.30434782608695
1985	55.26881720430107
1986	75.1063829787234
1987	79.57894736842105
1988	80.20833333333333
1989	67.9469387755102
1990	77.47895791583166
1991	51.40080160320641
1992	70.988
1993	64.362
1994	59.9
1995	55.4
1996	88.6
1997	71.34705882352941
1998	76.68461538461538
1999	64.1566037735849
2000	56.903284671532845
2001	53.284671532846716
2002	40.403284671532845
2003	51.15693430656934
2004	42.160583941605836
2005	34.41970802919708
2006	38.3962962962963
2007	34.08888888888889
2008	35.80925925925926
2009	47.5462962962963
2010	63.75925047021393
2011	37.431858407079645
2012	76.7313982300885
2013	88.63562831858408
2014	58.99136283185841
2015	73.46053097345133
2016	45.699823008849556
2017	58.684194690265485
2018	68.3933274336283
2019	63.941221238938056
2020	99.5623185840708
2021	123.91015929203537