Year	kg per hectare
1961	1059.852321783731
1962	1082.1638176900274
1963	1121.4364445807942
1964	1133.5025578878935
1965	1055.6617894087276
1966	1068.532543702946
1967	1177.0681485537423
1968	1180.0759254850154
1969	1224.6780104961913
1970	1276.2819290700195
1971	1312.7225278194308
1972	1292.4384081558935
1973	1314.2793269992828
1974	1327.9229590579428
1975	1450.6879141278755
1976	1439.1409292741678
1977	1523.2757365554617
1978	1586.9115343652436
1979	1515.8815811755667
1980	1619.4110087818415
1981	1720.7394169646805
1982	1697.9380089259073
1983	1762.4433668850525
1984	1793.5101169233292
1985	1839.4916561147354
1986	1869.1188427277498
1987	1854.4526020116884
1988	1972.0801496740503
1989	2013.2148259618607
1990	2074.46027654574
1991	2120.4020712059105
1992	2186.2310584293186
1993	2285.7618864947553
1994	2253.966735271744
1995	2251.703182499771
1996	2324.4667706677265
1997	2372.159852039559
1998	2441.171737296361
1999	2468.9504633419588
2000	2547.2955297369163
2001	2577.2159858235154
2002	2544.9536690602963
2003	2643.0568073297354
2004	2664.1573949112585
2005	2770.3803528301496
2006	2801.6462631704712
2007	2888.5331606909717
2008	2956.210668652964
2009	2939.1043162814726
2010	3027.812122380526
2011	3128.176994008722
2012	3193.5426719092357
2013	3262.9580475335188
2014	3271.9641014389936
2015	3274.5622526312236
2016	3347.2609953360743
2017	3480.768603404812
2018	3515.0569657920914
2019	3618.2585795761015
2020	3621.609254256984
2021	3673.1692609510064
2022	3741.6683834492305