Year	kilograms per hectare of arable land
1961	53.40504451038576
1962	56.754074074074076
1963	62.34615384615385
1964	71.88659793814433
1965	68.92760180995475
1966	67.41481481481482
1967	84.52135493372607
1968	83.40353460972018
1969	87.52212389380531
1970	90.82466567607726
1971	89.45294117647059
1972	106.47941176470589
1973	104.43290043290044
1974	114.2359210715829
1975	85.40462427745665
1976	82.2353237784018
1977	75.94646088101698
1978	86.86527030851967
1979	74.24695712767786
1980	73.84637687735443
1981	92.93486041517538
1982	76.96910257435424
1983	85.83230209415488
1984	110.32774729348955
1985	90.20833919299871
1986	110.90470873699624
1987	108.98062145492192
1988	97.3631167467146
1989	109.91745148914427
1990	85.10702312387174
1991	103.2830375386767
1992	90.69774944839556
1993	83.0457707561277
1994	80.8946638509161
1995	91.34995700546045
1996	91.59912145663021
1997	97.62647018190438
1998	96.24067445234925
1999	98.92742206509027
2000	94.20438700965144
2001	78.56290081535737
2002	88.03559693318729
2003	89.45808831246237
2004	82.54528883083063
2005	61.3139842419375
2006	64.09896725023472
2007	54.04222364859208
2008	91.30478402619391
2009	56.25237111144566
2010	66.65397643896485
2011	79.69890348168582
2012	83.68655783163646
2013	118.60559495135702
2014	121.66134792087418
2015	114.87414592887257
2016	119.0406526658462
2017	104.05546795288006
2018	128.98266792107808
2019	134.26230721450565
2020	126.39233833331143
2021	122.48240367044842