Year	kilograms per hectare of arable land
1961	148.90882178804026
1962	172.62641284949436
1963	196.86231884057972
1964	209.09595654797826
1965	218.84337349397592
1966	134.22215346534654
1967	260.3475
1968	227.04122423485322
1969	265.89526813880127
1970	257.1361916771753
1971	277.2173913043478
1972	260.7065491183879
1973	273.57265521796563
1974	223.5244385733157
1975	207.12309728656518
1976	244.42697368421054
1977	246.22302158273382
1978	253.60180995475113
1979	264.5436638214051
1980	265.1692708333333
1981	254.87734021949646
1982	231.76677524429968
1983	266.6782487838777
1984	270.1038062283737
1985	268.28867403314916
1986	217.09520500347463
1987	207.64419735927729
1988	216.18655692729766
1989	187.93694311172035
1990	212.69284712482468
1991	199.7923875432526
1992	185.93314763231197
1993	184.6370683579986
1994	175.68517217146874
1995	167.60961810466762
1996	168.32340425531916
1997	187.3122332859175
1998	175.45441595441596
1999	165.98502139800286
2000	161.1386704789135
2001	157.32804614275415
2002	162.32635379061372
2003	137.41875176626596
2004	137.51758138186037
2005	131.70275946983415
2006	130.27083938425793
2007	136.03706395348837
2008	167.1826150474799
2009	86.58056490560516
2010	99.8064232292125
2011	132.73315681082673
2012	115.41362261087743
2013	130.90848659428318
2014	130.87593400902568
2015	148.7214174281257
2016	137.795126776696
2017	141.03131066865325
2018	133.15005839581056
2019	118.50904921050447
2020	137.97115167919853
2021	128.56584965782554