Year	kilograms per hectare of arable land
1961	473.89112903225805
1962	538.1594202898551
1963	587.0389884088514
1964	580.5474919957311
1965	605.8426724137931
1966	636.5604322893693
1967	654.805489395486
1968	651.7066177313912
1969	722.2286049237983
1970	780.5827925979332
1971	736.8255913714916
1972	746.9497592889767
1973	787.8877271595718
1974	791.3020833333334
1975	784.1111797405806
1976	780.9006020395626
1977	771.7042186001918
1978	761.9729370544884
1979	834.8874984959692
1980	803.3167731251478
1981	784.788366043982
1982	746.4801126363957
1983	818.1916296918096
1984	851.6096459966737
1985	814.1216765354696
1986	795.628701594533
1987	711.3027420257415
1988	709.0196946227042
1989	654.6464423607281
1990	606.4474253569883
1991	628.442227950241
1992	606.0375472117307
1993	575.267649340574
1994	591.165725672534
1995	582.1545157780196
1996	568.4651062452809
1997	523.0642504118616
1998	521.5614582213141
1999	465.6911212181135
2000	408.72201036472086
2001	412.37113402061857
2002	386.9208037825059
2003	363.93731097058014
2004	357.31352549889135
2005	337.8064806480648
2006	353.1463825014021
2007	302.13908284582
2008	267.7086067879242
2009	238.171043898739
2010	293.3258361040485
2011	246.81113320079524
2012	289.81206726013846
2013	231.12769645608628
2014	247.8532631578947
2015	266.8045489443378
2016	291.68579766536965
2017	290.55834136933464
2018	274.26934378060724
2019	273.80180001978044
2020	276.6139545992855
2021	274.35393818544367