Year	kilograms per hectare of arable land
1961	55.989713998996486
1962	58.020342409501545
1963	62.726434882094956
1964	70.48652952041272
1965	84.39599663146984
1966	102.47071780253953
1967	119.61382512589104
1968	140.27245332459876
1969	159.9800715042373
1970	170.4461823966066
1971	192.80373831775702
1972	205.24360010778767
1973	225.87635135135136
1974	234.36968301273367
1975	248.38312698734862
1976	242.9163449163449
1977	244.62365153673926
1978	242.50995988850363
1979	248.06906906906906
1980	239.30004787634223
1981	230.54644432194047
1982	219.05633802816902
1983	236.562664087329
1984	225.67726178190574
1985	235.1769691957825
1986	243.67067108533556
1987	226.29475138121546
1988	236.09651548672565
1989	229.6447897877064
1990	107.13094245204337
1991	70.24373259052925
1992	83.15547185603683
1993	89.62929045788186
1994	99.87055944055945
1995	106.34890921885996
1996	113.97336475292774
1997	121.39083250035699
1998	110.77470299494914
1999	108.47782831154065
2000	115.42199671264204
2001	115.88633686690224
2002	116.19523443504997
2003	128.8710574402161
2004	129.13560666137985
2005	161.93888477061196
2006	159.33861578266493
2007	181.17229129662522
2008	157.71817653408618
2009	146.8009282280789
2010	180.47834518422755
2011	169.7422959091728
2012	177.88558352402745
2013	179.3272794662713
2014	164.00073206442167
2015	174.09754753375586
2016	189.69091245604295
2017	190.39149170257633
2018	173.07657371241712
2019	176.5083672546359
2020	155.06726457399103
2021	156.06439709859225