Year	kg per hectare
1961	804.9699824957141
1962	818.0490365487053
1963	802.5683382548325
1964	802.3869025700322
1965	775.4024508984456
1966	753.2089083170378
1967	824.9490056445503
1968	825.6262632894583
1969	814.4177933763292
1970	811.8972343626613
1971	815.1874699545245
1972	832.5627970111308
1973	804.5714563071239
1974	910.9650220262467
1975	926.716148238314
1976	893.6637996743657
1977	902.6710130795909
1978	913.1490174351478
1979	908.7686720013272
1980	910.4866367786738
1981	997.092522572477
1982	981.3827260715391
1983	954.9413676609764
1984	906.8113052514992
1985	987.1697367274697
1986	968.7362526677346
1987	963.2558725222864
1988	1012.7304774594434
1989	989.9041846193953
1990	946.1534908906466
1991	945.6066532838759
1992	894.2102959702803
1993	936.345727731327
1994	889.717805752079
1995	964.9942231930337
1996	999.674240944968
1997	924.498691475387
1998	994.4904386133196
1999	1023.645223798507
2000	958.2597324383339
2001	1017.7538377423854
2002	1043.1567153432782
2003	1049.991229037716
2004	1105.6300527078033
2005	1053.1303889930073
2006	1161.4980227995895
2007	1163.0373912035627
2008	1180.1886980598279
2009	1199.0175746020923
2010	1243.143918218709
2011	1147.918681301342
2012	1288.226879664789
2013	1197.6403679697348
2014	1293.885528179217
2015	1310.8445762312776
2016	1289.7122184672294
2017	1293.1403184727847
2018	1329.594692828407
2019	1354.8118486690032
2020	1397.5385571592394
2021	1369.612033609801
2022	1366.0407403745128