Year	kilograms per hectare of arable land
1961	42.23565573770492
1962	54.08606557377049
1963	93.94057377049181
1964	108
1965	72.92436974789916
1966	113.09574468085107
1967	98.10560344827586
1968	125.54585152838428
1969	118.68131868131869
1970	144.41555555555556
1971	165.5737704918033
1972	193.64754098360655
1973	225
1974	202.04918032786884
1975	192.41803278688525
1976	215.14947368421053
1977	222.18105263157895
1978	216.5631067961165
1979	133.39285714285714
1980	108.15770609318996
1981	171.36434108527132
1982	125.53027139874739
1983	174.65106382978723
1984	114.28958333333334
1985	169.27
1986	127.64423076923077
1987	177.8326923076923
1988	180.03148148148148
1989	144.3925925925926
1990	135.99272727272728
1991	137.17345132743364
1992	127.49829931972789
1993	127.5085324232082
1994	113.01369863013699
1995	120.0807560137457
1996	162.47787610619469
1997	167.0796460176991
1998	138
1999	124.41838351822504
2000	124.02966034125339
2001	117.41655969191271
2002	79.81915065396416
2003	86.5209619759506
2004	98.39411283728536
2005	150.89203423304807
2006	108.77317880794702
2007	152.48850118953212
2008	136.74859110832813
2009	122.92381393911296
2010	184.17149832163565
2011	194.46737984028928
2012	151.83153273809523
2013	151.17618697633395
2014	100.20803078710426
2015	116.83413689195004
2016	96.11229438457175
2017	90.08714786264892
2018	114.96332871012484
2019	59.39074895977809
2020	80.9652427184466
2021	92.19506241331484