Year	kilograms per hectare of arable land
1973	74.61397480284676
1974	70.64071143394737
1975	79.77670805891124
1976	80.18077355249052
1977	96.94704042738753
1978	106.66975579199286
1979	117.02497927176944
1980	127.11369815696843
1981	119.95366732761737
1982	122.24515729003116
1983	129.307681509841
1984	136.68597926662986
1985	120.90467462595899
1986	125.65443444263079
1987	147.35894596850912
1988	160.84574558826384
1989	160.3917431452488
1990	160.45124469252787
1991	166.09002141222277
1992	113.36955398621605
1993	103.51123178617426
1994	108.43976259408866
1995	124.33379894191528
1996	129.18237607537935
1997	130.05041530992074
1998	131.87050736779662
1999	134.40367488894304
2000	131.28550000250655
2001	134.66992295018395
2002	148.9590986959196
2003	153.12553892729773
2004	167.7635085372152
2005	167.94661507231416
2006	170.23656224243064
2007	182.97872481318745
2008	174.13358983503122
2009	168.7213349194966
2010	191.45809045083786
2011	202.98880732368247
2012	203.50270611171126
2013	210.85253159643426
2014	218.52224873119727
2015	210.84788950121896
2016	210.21026681560016
2017	214.78112745942042
2018	209.56951431858343
2019	193.08907929423128
2020	201.46709468400405
2021	202.1133847537778