Year	kilograms per hectare of arable land
1961	140.48739495798318
1962	165.45407279029462
1963	114.63131313131314
1964	106.97848101265822
1965	121.58511979823456
1966	131.8598484848485
1967	128.4318181818182
1968	163.26190476190476
1969	110.69651741293532
1970	129.7530864197531
1971	137.62254901960785
1972	121.53284671532846
1973	134.17874396135267
1974	122.18225419664269
1975	85.17647058823529
1976	105.88888888888889
1977	117.47368421052632
1978	135.886
1979	162.12666666666667
1980	183.62666666666667
1981	163.77777777777777
1982	181.60210035005835
1983	192.9988492520138
1984	218.91857798165137
1985	222.2340182648402
1986	217.77226606538895
1987	227.60670391061453
1988	230.62360801781736
1989	233.90788013318536
1990	190.1588888888889
1991	196.2281284606866
1992	202.93591160220996
1993	239.20795454545456
1994	246.32276330690826
1995	232.55417607223475
1996	238.07215332581737
1997	235.03716216216216
1998	262.00674915635545
1999	286.2773480662983
2000	269.90710382513663
2001	266.44978165938863
2002	304.5630341880342
2003	259.1842105263158
2004	287.01
2005	255.29181818181817
2006	291.3152380952381
2007	288.525
2008	311.71166666666664
2009	257.92833333333334
2010	229.0475
2011	257.31461538461537
2012	205.85524615384617
2013	173.98568461538463
2014	261.3145923076923
2015	190.09505384615386
2016	126.26283969465649
2017	117.3936221784578
2018	138.2963254593176
2019	190.03896840182307
2020	298.95433673469387
2021	153.93822886297377