Year	kilograms per hectare of arable land
1961	13.704545454545455
1962	13.870909090909091
1963	17.745454545454546
1964	17.07090909090909
1965	13.174545454545454
1966	30.227272727272727
1967	22.672072072072073
1968	37.15945945945946
1969	29.76818181818182
1970	42.10181818181818
1971	22.561818181818182
1972	38.18839285714286
1973	43.845217391304345
1974	55.21965811965812
1975	47.00854700854701
1976	78.7775
1977	82.7424
1978	76.2512
1979	80.38430744595676
1980	67.32283464566929
1981	70.00235294117647
1982	62.246923076923075
1983	52.36076923076923
1984	69.38461538461539
1985	73.13846153846154
1986	94.61538461538461
1987	96.46153846153847
1988	82.53846153846153
1989	99.53846153846153
1990	90
1991	110.15384615384616
1992	121.46153846153847
1993	129.90936555891238
1994	124.81536189069423
1995	137.26937269372695
1996	134.45995591476856
1997	145.03301164587128
1998	113.11653755914698
1999	122.17945768487027
2000	125.15378063783477
2001	115.55480359811635
2002	76.63425990795331
2003	91.671826625387
2004	119.78070701018574
2005	141.69071428571428
2006	136.0438247011952
2007	123.7734771573604
2008	77.10752688172043
2009	103.96923276645462
2010	150.8052259698707
2011	172.99835593916976
2012	200.83697336902918
2013	207.00540971718635
2014	196.92642083657722
2015	199.58744217687078
2016	175.73506388702086
2017	206.23156914893616
2018	211.315976331361
2019	176.9513263979194
2020	237.0934555984556
2021	219.3496138996139