Year	kilograms per hectare of arable land
1961	41.334278082267616
1962	46.72553668934753
1963	51.06483421876219
1964	55.029480799703315
1965	61.038199039548026
1966	69.24350581941323
1967	76.23480379627135
1968	76.85677817679559
1969	76.13479994081715
1970	80.63532545632765
1971	82.87535888168385
1972	85.72313082193607
1973	91.54384325046777
1974	88.70377917328071
1975	95.64874292118924
1976	105.19487907031619
1977	102.81232996697972
1978	104.88532494503455
1979	110.17931922333183
1980	112.83098079521072
1981	106.99803374745039
1982	93.24290357627886
1983	98.8041361808644
1984	105.16178531675233
1985	98.55976656991452
1986	93.14965483450057
1987	94.80425929515134
1988	95.62842738852818
1989	98.80015603631155
1990	100.44128228742541
1991	100.79727853896036
1992	102.80303938505
1993	108.88553034780136
1994	108.0577016472554
1995	108.77280044434912
1996	112.87208255589196
1997	113.86286026397586
1998	112.34110248780985
1999	111.86022626704984
2000	108.75145927421194
2001	110.13026459521095
2002	111.88176006058609
2003	124.18978640706186
2004	119.23050596412567
2005	115.91592927432751
2006	126.65110394554986
2007	120.38169378167882
2008	99.97463738620108
2009	118.93186803377108
2010	124.70040040198711
2011	130.22772655760352
2012	134.89769036982085
2013	135.5551010135426
2014	127.9752191073246
2015	129.02628936366347
2016	127.81523325126759
2017	127.71658008784253
2018	129.1545468780906
2019	128.8406918360205
2020	131.15216842233392
2021	128.7409295738217