Year	kilograms per hectare of arable land
1961	18.359550561797754
1962	46.2247191011236
1963	57.151162790697676
1964	88.81395348837209
1965	76.54320987654322
1966	75.49382716049382
1967	65.51898734177215
1968	87.17910447761194
1969	86.88059701492537
1970	88.76119402985074
1971	110.43283582089552
1972	141.42857142857142
1973	117.11428571428571
1974	175.85714285714286
1975	156
1976	157.5
1977	140
1978	132.22222222222223
1979	193.33333333333334
1980	182.22222222222223
1981	197.89473684210526
1982	138
1983	103.80952380952381
1984	142.72727272727272
1985	113.625
1986	180.83333333333334
1987	165.3846153846154
1988	180
1989	153.66666666666666
1990	143.75
1991	81.87134502923976
1992	79.29782082324455
1993	93.47553324968632
1994	117.1875
1995	126.05042016806723
1996	138.68613138686132
1997	146.34146341463415
1998	146.7304625199362
1999	118.42105263157895
2000	64.76683937823834
2001	90.9090909090909
2002	116.62188099808061
2003	33.26219512195122
2004	83.1425485961123
2005	76.72811059907833
2006	52.72839506172839
2007	53.8031914893617
2008	100.14409221902017
2009	59.14239482200647
2010	42.68987341772152
2011	90.63467492260062
2012	72.32060606060608
2013	83.0620178041543
2014	84.91831395348838
2015	125.27350427350427
2016	106.08198324022345
2017	118.03643835616438
2018	84.72620967741935
2019	81.1758575197889
2020	97.71966145833333
2021	76.17057291666667