Year	kilograms per hectare of arable land
1961	65.56842105263158
1962	84.96140350877192
1963	121.05263157894737
1964	115.78947368421052
1965	85.96491228070175
1966	101.05263157894737
1967	107.36842105263158
1968	167.71929824561403
1969	190.10526315789474
1970	173.21052631578948
1971	200.9578947368421
1972	167.71929824561403
1973	226.14840989399292
1974	256.18374558303884
1975	233.5689045936396
1976	196.79151943462898
1977	235.13427561837455
1978	282.26148409893995
1979	279.5053003533569
1980	259.7173144876325
1981	255.8303886925795
1982	254.41696113074204
1983	312.01413427561835
1984	340.2826855123675
1985	282.8070175438597
1986	298.2456140350877
1987	333.3333333333333
1988	360.25
1989	411.53846153846155
1990	417.6923076923077
1991	447.6923076923077
1992	491.2
1993	467.39130434782606
1994	560.8695652173913
1995	554.5454545454545
1996	710.4761904761905
1997	909.5238095238095
1998	947.6190476190476
1999	836.3636363636364
2000	795.2380952380952
2001	557.9666666666667
2002	629.19155
2003	919.6685714285715
2004	751.0608095238097
2005	683.5356190476191
2006	845.4687142857143
2007	858.04355
2008	915.7098999999998
2009	382.9673181818182
2010	519.3177333333333
2011	706.0794827586207
2012	635.3276724137932
2013	589.842025862069
2014	566.5276293103449
2015	623.3775147928994
2016	590.5689940828403
2017	632.6793675889328
2018	641.8436039603961
2019	637.0597942386831
2020	660.5452674897119
2021	595.8299588477366