Year	kilograms per hectare of arable land
1961	36.21714992634874
1962	40.80028463299537
1963	44.59331350249501
1964	48.03231986861578
1965	53.49806537620399
1966	60.66650239558745
1967	66.67844166647085
1968	66.70453420311262
1969	66.4821198359086
1970	70.5027268886669
1971	72.65588342713976
1972	75.55277728910204
1973	81.16529066421089
1974	78.88242154157388
1975	84.88308498279592
1976	92.8513376347174
1977	92.05398111485286
1978	94.50164846539013
1979	98.81022400974248
1980	101.44559223195851
1981	96.55166458599776
1982	85.63609079767379
1983	91.33111496599028
1984	97.03186605591866
1985	90.90733863918342
1986	85.68359858954419
1987	87.25485573658975
1988	87.55128884366502
1989	90.32082309947377
1990	91.27516606986342
1991	92.02346226351835
1992	94.01185859275259
1993	99.38247151417896
1994	98.85507247156336
1995	100.23369544838425
1996	104.06547330929804
1997	104.95950261035341
1998	103.34827128331192
1999	103.09622770050478
2000	99.45952937837491
2001	100.72209182041559
2002	102.94471801378329
2003	113.20893839393062
2004	108.28490561240767
2005	107.20373793146324
2006	112.60741110913818
2007	112.33100815293227
2008	94.86249941556629
2009	109.78546123140441
2010	116.01288462079748
2011	123.80952341115535
2012	128.91826961979626
2013	127.92273050072748
2014	122.9162959044277
2015	124.18172817161671
2016	122.19649823499029
2017	122.63503147323692
2018	125.73893347710168
2019	124.49009553168749
2020	131.2004383787284
2021	128.21813342204257