Year	kg per hectare
1961	1272.484361458881
1962	1335.198599940184
1963	1308.2440512982685
1964	1388.3156169156175
1965	1362.903082204468
1966	1366.6011239963048
1967	1429.9713327613126
1968	1347.6246356775507
1969	1412.7567560722541
1970	1533.1161227359291
1971	1494.0110584815197
1972	1445.664121961755
1973	1613.6702305205008
1974	1661.0803256628433
1975	1624.802097658824
1976	1629.0781105240549
1977	1691.7725673866828
1978	1710.2083625732785
1979	1726.193597769889
1980	1796.689896243902
1981	1994.8993986526057
1982	1985.6734922269127
1983	1981.486549660637
1984	2094.1273553580095
1985	2138.555439320874
1986	2033.7898946927505
1987	2097.1703677742744
1988	2092.034620994587
1989	2109.240054717389
1990	2090.1830899439747
1991	2143.3167524126256
1992	2423.569417114625
1993	2530.142462853889
1994	2435.0664687416634
1995	2569.5850527085327
1996	2517.747348153807
1997	2663.4497113558564
1998	2853.9532874871365
1999	2810.3917908926105
2000	2851.8299304818797
2001	3043.5026632780427
2002	2938.8157031661312
2003	3189.7403285957266
2004	3190.0299007654166
2005	3210.029038605297
2006	3268.2007786316876
2007	3544.0909598294193
2008	3662.1102082863003
2009	3344.9047712964443
2010	3869.3219937233084
2011	3817.7502175135373
2012	3971.247129129658
2013	4168.645441498453
2014	4178.510628805552
2015	4360.498272748027
2016	4191.40157296325
2017	4689.555626207162
2018	4346.474306105397
2019	4860.599405630767
2020	4721.754563425142
2021	4439.830195112448
2022	4591.732428480137