Year	kilograms per hectare of arable land
1961	9.250203748981255
1962	10.934891485809683
1963	13.387510692899914
1964	17.88031565103025
1965	15.48897885739991
1966	21.410433979686058
1967	19.63975155279503
1968	33.727722772277225
1969	30.73381294964029
1970	38.40243902439025
1971	50
1972	45.42309924550203
1973	45.8313539192399
1974	41.30170316301703
1975	29.551122194513717
1976	47.31457800511509
1977	41.46981627296588
1978	39.08355795148248
1979	63.58974358974359
1980	57.66215253029223
1981	45.85436193222783
1982	44.160583941605836
1983	29.68980797636632
1984	39.61136023916293
1985	45.53706505295008
1986	40.88149847094801
1987	46.940356312935705
1988	54.11686274509804
1989	56.19968178202068
1990	57.92425463336019
1991	62.85725677830941
1992	64.08839779005525
1993	71.09375
1994	48.72389791183295
1995	50.535987748851454
1996	116.37604245640637
1997	96.92423105776444
1998	96.51076466221232
1999	77.50698016164584
2000	75.8353969410051
2001	84.36165577342048
2002	61.02679217958001
2003	110.62960288808664
2004	129.98848092152627
2005	140.55603448275863
2006	148.69699140401147
2007	139.51151761517616
2008	104.41401971522454
2009	93.9257403189066
2010	145.7835710772258
2011	131.58801020408163
2012	178.1498842592593
2013	252.24865883780387
2014	184.49149460202784
2015	115.7440335996047
2016	153.18241476889904
2017	157.18396904620172
2018	187.2559206245934
2019	167.01072642819517
2020	193.95296878087333
2021	211.12080882298625