Year	kilograms per hectare of arable land
1961	20.101925254813136
1962	29.44507361268403
1963	39.09718309859155
1964	45.42056338028169
1965	36.741573033707866
1966	36.65210084033613
1967	40.19607843137255
1968	41.50224089635854
1969	39.36338185890258
1970	40.421052631578945
1971	51.55891407780577
1972	57.485785953177256
1973	70.9211986681465
1974	69.05222437137331
1975	59.22063273727648
1976	67.41890410958904
1977	79.75995635570104
1978	79.08557457212714
1979	84.50743846361915
1980	84.13254310344827
1981	75.10729613733906
1982	81.05797488645472
1983	84.47991487097633
1984	96.04928457869634
1985	96.35883905013192
1986	114.98791064388962
1987	130.3083158995816
1988	140.72547403132728
1989	151.0028801843318
1990	182.2390317700454
1991	197.8933508887426
1992	166.57980456026058
1993	176.15463564830654
1994	175.77683615819208
1995	202.66777824093373
1996	199.34237566789972
1997	219.25955100433242
1998	233.59466875735006
1999	231.03312302839117
2000	233.56990773598298
2001	254.60928512736237
2002	323.9057259158751
2003	334.97365724381626
2004	364.02707774798927
2005	367.5906169792695
2006	418.9241783051559
2007	395.6144844844845
2008	404.24609289617484
2009	370.3573352112676
2010	477.4633068633011
2011	583.6699369482976
2012	600.5435450421257
2013	632.3657343640197
2014	722.0160695187166
2015	687.8663672391017
2016	664.5791681957187
2017	678.3314823133071
2018	550.2566347262311
2019	508.8867260910111
2020	601.9351884483602
2021	615.3115704967386