Year	kilograms per hectare of arable land
1966	41.99654784315809
1967	45.106167502490315
1968	47.47135290707615
1969	49.899796731990705
1970	53.8889309397402
1971	57.110435971502426
1972	60.64343231196549
1973	65.79180289345108
1974	62.00907805200495
1975	66.83996269429049
1976	70.5344093039212
1977	75.71315222195706
1978	81.01090305958512
1979	85.99247900732367
1980	87.75384206354892
1981	86.41668571558928
1982	85.35420124311845
1983	90.19547347507225
1984	94.28673811455896
1985	90.47004733568264
1986	92.64727631768014
1987	96.7097600858405
1988	102.26482746782179
1989	102.59881445247161
1990	101.0130608709333
1991	100.79126021980846
1992	92.21282480433658
1993	88.4226467780835
1994	90.9725529134382
1995	96.1289588009623
1996	99.17296821855963
1997	101.42629060800478
1998	101.69162044171941
1999	103.41616995270414
2000	99.9472453410863
2001	101.81573115291499
2002	105.00481871995117
2003	108.09196852860674
2004	113.57304191963047
2005	113.8099763742704
2006	117.02646633354613
2007	122.67118844907037
2008	114.98719461980795
2009	115.8468527528988
2010	127.4326955191172
2011	132.02268973600653
2012	130.76322966967254
2013	133.17980568753947
2014	136.32400761862652
2015	134.44276087615168
2016	134.9029230297312
2017	139.0283836617667
2018	138.01755132973244
2019	133.87793377402244
2020	141.97443826502789
2021	139.79062487253438