Year	kg per hectare
1961	830.5698653327784
1962	866.3331631714278
1963	841.6341826248178
1964	850.804141772811
1965	836.8452006181128
1966	787.0264609173046
1967	870.509187795607
1968	864.881907559596
1969	852.3483172010262
1970	833.830330668119
1971	860.6390908724517
1972	902.8875502650444
1973	822.5103419346842
1974	965.9362202452388
1975	960.0207075612934
1976	948.5115512456903
1977	954.165503860279
1978	990.6813494474873
1979	1010.2253143299042
1980	1136.1962313766667
1981	1239.56761951087
1982	1152.1682251146428
1983	1124.5816680311957
1984	1066.8922480139502
1985	1123.2634062747336
1986	1123.5232805760236
1987	1096.1626479490365
1988	1177.9916981008587
1989	1056.0932597137678
1990	1069.875981526971
1991	1063.1309866717684
1992	1320.1835026976644
1993	1463.9256414379436
1994	1293.24785457089
1995	1307.9866441855202
1996	1287.703475446655
1997	1315.2570548066087
1998	1281.4416904911195
1999	1275.2638417172507
2000	1255.8915268673331
2001	1458.8348217128666
2002	1479.2877480093632
2003	1398.550835613275
2004	1576.4733118663664
2005	1475.7193031459497
2006	1581.9441369565097
2007	1511.3166794531014
2008	1706.125107813072
2009	1725.6863976645693
2010	1635.4147195029193
2011	1719.175681459259
2012	1750.4415949110469
2013	1803.094210509037
2014	1880.4163515940045
2015	1945.5733337123233
2016	1928.1935246360315
2017	1919.5952063413547
2018	2012.7018213939
2019	2115.6194647540774
2020	2010.449077089836
2021	2138.6968133069663
2022	1940.776739443533