Year	kilograms per hectare of arable land
1961	33.80362182502352
1962	36.3001925854598
1963	42.28250362493959
1964	67.90813397129186
1965	86.56635469162467
1966	114.46039366298608
1967	146.42522913651712
1968	202.7746750120366
1969	166.4915824915825
1970	154.22839208112023
1971	153.88576960309777
1972	156.51017441860466
1973	153.61917475728154
1974	138.45851634943875
1975	171.61233257518322
1976	166.96802030456854
1977	188.37007874015748
1978	187.90499235863473
1979	210.4860148832435
1980	216.8016723281944
1981	273.01255230125525
1982	264.6935568360398
1983	264.6642182581322
1984	246.38823220383503
1985	233.43832020997377
1986	221.52395915161037
1987	208.23529411764707
1988	235.15625
1989	209.6808731808732
1990	177.61929460580913
1991	122.04528985507247
1992	58.552755127254756
1993	50.44031503814915
1994	56.25293676580855
1995	31.01550775387694
1996	45.68165596002855
1997	46.49348534201955
1998	47.794117647058826
1999	34.2666294019005
2000	42.96653431650596
2001	57.71041246034035
2002	113.76840536512668
2003	147.32741498645802
2004	80.8517959553275
2005	74.23195713835487
2006	73.93997445721584
2007	102.00940032414911
2008	111.2428756476684
2009	104.60044500953592
2010	97.05335844318896
2011	133.08246153846153
2012	95.86976183298161
2013	109.13825812014947
2014	108.80321285140562
2015	122.00216542724449
2016	138.02860411899314
2017	130.63104027422702
2018	131.834511213341
2019	135.84117951668586
2020	139.22890320733103
2021	131.0598888636701