Year	kilograms per hectare of arable land
1961	96.95038015206083
1962	98.2170160295931
1963	114.42934106920845
1964	125.79273327828241
1965	130.75832687838886
1966	107.29295564666418
1967	104.21306607275427
1968	119.49088202456271
1969	127.65761467889908
1970	136.84146788990824
1971	136.16087751371114
1972	153.6502752293578
1973	148.54241645244215
1974	158.3302548947174
1975	186.247491638796
1976	191.4522342064715
1977	217.38575430172068
1978	242.65594989561586
1979	262.2395833333333
1980	290.24496937882765
1981	306.853055916775
1982	346.60973856323756
1983	347.54541360156134
1984	349.8501270184506
1985	374.62039045553144
1986	435.3753235547886
1987	441.0402097902098
1988	433.46320346320346
1989	409.50174216027875
1990	419.853765323993
1991	424.96691662990736
1992	335.5059496497507
1993	377.7026045608483
1994	322.7499942587248
1995	399.8580049698261
1996	427.04928314751004
1997	388.1878571531386
1998	419.2152118040392
1999	393.9545758183033
2000	449.7433059621564
2001	457.3044390073401
2002	454.35967302452315
2003	477.6668960770819
2004	541.2816188870152
2005	600.0780335544284
2006	586.5642994241842
2007	523.1669266770671
2008	520.2498107494323
2009	483.0790568654646
2010	473.37278106508876
2011	503.5612535612536
2012	462.99045599151646
2013	536.748930010303
2014	546.9682106212053
2015	569.4591718535313
2016	568.0420748728975
2017	574.1819761255684
2018	535.2902591013448
2019	504.721963342653
2020	496.1367013372957
2021	542.5739356516087