Year	kilograms per hectare of arable land
1961	7.09551656920078
1962	9.673509286412513
1963	12.213516160626837
1964	16.45731108930324
1965	25.61731431382194
1966	36.74901185770751
1967	26.777204130262113
1968	26.895450917797287
1969	34.82357658380112
1970	44.38960515713134
1971	46.19524532119373
1972	53.33062303079581
1973	65.80678104575163
1974	56.62908795449929
1975	70.64233426126405
1976	66.32003032482353
1977	94.53130926529884
1978	112.63092398631132
1979	135.8449420817346
1980	159.44580192357682
1981	156.5502634569687
1982	161.2143559488692
1983	173.6561043802423
1984	175.9859649122807
1985	143.87177352206496
1986	143.7609958506224
1987	188.75013311148086
1988	209.44503722084366
1989	208.08671031096563
1990	220.30452342487882
1991	237.5103103103103
1992	237.60781122864117
1993	206.7543281121187
1994	238.95608947804473
1995	297.5430674025757
1996	301.52758109251795
1997	299.4533315692093
1998	300.9925276903885
1999	306.1078337278094
2000	287.4484879032258
2001	295.44852610286927
2002	333.5089331208476
2003	328.65825460238085
2004	352.2643512396969
2005	375.1049931763939
2006	374.7651369235917
2007	385.3146397551943
2008	372.6581053678983
2009	383.96759580704634
2010	425.2393477857329
2011	444.64980476912706
2012	457.33323895380204
2013	458.516151953076
2014	477.57927806434265
2015	480.2420628218834
2016	474.31918405147536
2017	467.31947991829793
2018	450.3718168331466
2019	399.5989717117678
2020	385.3229908591987
2021	374.80508754202566