Year	kilograms per hectare of arable land
1961	50.91369710467706
1962	58.652151373768795
1963	44.54545454545455
1964	34.3848697809012
1965	33.640382317801674
1966	26.56185353744311
1967	32.27535037098104
1968	27.641632653061226
1969	33.15197074360016
1970	32.955433932759966
1971	32.03362001563722
1972	38.76710149538658
1973	30.526971728221564
1974	43.720074701976074
1975	31.6089881508533
1976	38.412750545615175
1977	40.828501578826824
1978	39.4672799558125
1979	33.37961236379158
1980	33.10093096753632
1981	36.37184879256776
1982	26.705831228452183
1983	21.030991430755407
1984	22.67594443062193
1985	19.688411326984006
1986	46.06984427582474
1987	58.8325156040169
1988	56.45798204339518
1989	37.579058025393834
1990	25.665878185932335
1991	18.210827811774973
1992	19.149820871503184
1993	32.55280563022222
1994	40.5433598368066
1995	35.25921155526933
1996	42.289522331515165
1997	48.66835764109068
1998	53.51724912911563
1999	53.26872462863006
2000	56.288048170367254
2001	69.09957813323959
2002	66.8580837931561
2003	68.32950855163455
2004	70.90459713297084
2005	64.33238030212512
2006	72.01770923803673
2007	84.81386446809405
2008	62.33329852772267
2009	79.87910583941606
2010	75.30280254514754
2011	83.43544231319783
2012	79.5472242981544
2013	85.22108395426028
2014	91.77682657467783
2015	106.9712506475809
2016	117.94388195163356
2017	143.59965396312046
2018	113.53338221888862
2019	141.66203194993835
2020	141.49496799640892
2021	111.82419115137976