Year	kg per hectare
1961	675.3548155144105
1962	702.2444558970799
1963	698.0325256717177
1964	691.1341872514964
1965	658.3434423799708
1966	643.8725076143837
1967	684.3052507731687
1968	666.7837728404263
1969	654.6722974688171
1970	691.0070343348323
1971	692.2179577140292
1972	639.2501162640923
1973	643.4429617879097
1974	829.8098270744546
1975	818.8812042216238
1976	691.3970613067854
1977	744.4430957449509
1978	777.0749239539233
1979	788.7698301641261
1980	806.5183538426304
1981	947.0383757726855
1982	928.13878169238
1983	884.1689677575777
1984	879.9716521574989
1985	958.6947222931435
1986	950.6567884938244
1987	944.7141128910638
1988	1005.1910791780003
1989	964.3806306642003
1990	875.0109675562944
1991	918.3575463891964
1992	907.5549292588528
1993	929.0062952760446
1994	902.4726829520721
1995	962.0641277674397
1996	987.2615493556478
1997	966.8673046539312
1998	998.3883457507416
1999	1032.254594905285
2000	971.6478593335081
2001	1002.0222050299262
2002	1011.135973444128
2003	1075.3962679525243
2004	1089.590086985874
2005	1143.4099313096258
2006	1180.594596949682
2007	1107.1726767485422
2008	1231.7997463787628
2009	1192.1163592024361
2010	1184.2888387226094
2011	1061.2674996023782
2012	1187.662083084175
2013	1113.2322717521665
2014	1226.522740590705
2015	1268.2541862438238
2016	1311.2737001113567
2017	1289.9336927031375
2018	1344.8261305162398
2019	1369.2182767421425
2020	1368.2567947456344
2021	1323.3527711056452
2022	1395.067596872248