Year	kilograms per hectare of arable land
1961	268.87149709669274
1962	303.0299220517978
1963	313.58597576695024
1964	328.0354351224596
1965	352.6608419380461
1966	358.49056603773585
1967	368.18932305998896
1968	379.7609118710036
1969	405.55555555555554
1970	414.4422590615341
1971	423.0876996357523
1972	380.8126721763085
1973	437.4310915104741
1974	397.3727422003284
1975	388.7232312279751
1976	412.1786197564276
1977	420.654230873209
1978	468.69171329602983
1979	488.9407336445611
1980	476.044105013438
1981	440.4090656672275
1982	437.33611144177706
1983	448.66442486543866
1984	447.1133724427054
1985	444.31719055050826
1986	428.6142051458451
1987	444.6890136481655
1988	441.5249216703465
1989	433.42263650671634
1990	416.5322880746235
1991	390.1381898912986
1992	374.3041206204879
1993	368.41794502813883
1994	345.9028051286174
1995	319.7914675372575
1996	297.4089494397648
1997	291.6657828309611
1998	290.7989381442625
1999	248.85235150833802
2000	217.97452936426342
2001	240.5585797033163
2002	196.5456388193277
2003	203.68624574479344
2004	216.82390026228737
2005	228.40698222525563
2006	229.12712958576793
2007	230.30480721494928
2008	227.72745309306714
2009	191.20025250861335
2010	218.78917962478704
2011	209.3951812089429
2012	167.96145677968983
2013	203.45017159272348
2014	208.40125104614765
2015	208.93353594438537
2016	212.10999979182102
2017	199.88791613927233
2018	187.7928029639907
2019	163.42799698290648
2020	175.12999526062202
2021	177.18726277901996