Year	kilograms per hectare of arable land
1961	10.878302754637911
1962	11.850871781960093
1963	14.524217124170052
1964	14.398074227558048
1965	15.247764252139328
1966	16.997810573156443
1967	20.25517273499994
1968	24.279317503715383
1969	25.45678762078519
1970	29.074424059268615
1971	30.02110422084417
1972	36.378529418147885
1973	38.83760356173368
1974	41.401781784061626
1975	42.92165629416772
1976	49.62440697360847
1977	55.333098735135714
1978	54.41507856449471
1979	56.715024245614266
1980	61.92942927218592
1981	52.174450166341735
1982	51.24714261069122
1983	45.32493440735302
1984	57.515716307755405
1985	55.584349367746
1986	64.51598552221785
1987	66.25151591264336
1988	63.8003934234806
1989	60.5902894918839
1990	59.11040146105369
1991	57.93158525174507
1992	58.645426402096206
1993	66.81165581048405
1994	73.62507685655656
1995	65.65683727766014
1996	78.72508643311554
1997	87.18232981750448
1998	86.97963343899137
1999	86.48150556871992
2000	92.95303917274556
2001	96.28988111563342
2002	98.6379091755819
2003	109.41092145231342
2004	127.14176813566519
2005	104.14546784207593
2006	108.64974267315688
2007	130.04061436059175
2008	115.78686466733642
2009	89.26457080083847
2010	117.35398153272388
2011	142.07796711075218
2012	131.10171525920842
2013	145.99834037829095
2014	156.39924144518727
2015	132.5982734353778
2016	143.44321670803555
2017	161.98014159093808
2018	169.49232191353337
2019	169.37632148091373
2020	196.81896865578503
2021	205.10315897421876