Year	kg per hectare
1961	826.1798779602595
1962	841.4943334753132
1963	839.5915963561142
1964	817.5028331397366
1965	802.6353855899198
1966	759.6184841419704
1967	851.5337638608476
1968	917.9289908268779
1969	891.6864787598023
1970	962.6117341315764
1971	974.1132561339252
1972	1041.8884797543246
1973	968.6077267483874
1974	1177.1213339915182
1975	1212.0291060832383
1976	1144.035621699582
1977	1269.669482640648
1978	1237.0694301367482
1979	1312.344302581701
1980	1345.938196197552
1981	1625.9484308620117
1982	1572.534052562476
1983	1507.2808009062373
1984	1363.9602006895147
1985	1474.8976979686795
1986	1512.3315216010922
1987	1371.8017829451032
1988	1505.6818227325396
1989	1494.8152439292444
1990	1431.9107792787302
1991	1393.7568620468885
1992	1442.5393461758538
1993	1480.240798172658
1994	1426.6225158675786
1995	1516.0101608660777
1996	1551.0025526813604
1997	1525.0355136744854
1998	1622.6504517426454
1999	1649.559155988119
2000	1680.9339565452974
2001	1692.4710457285587
2002	1699.203302328313
2003	1762.6489917738709
2004	1841.8359540547503
2005	1897.656350422682
2006	1923.9941826991794
2007	1947.9988184409733
2008	1978.4420441683224
2009	2089.776724330694
2010	2021.8624267868847
2011	2041.9099735275017
2012	2054.5975715920404
2013	2048.278357408565
2014	2189.510625837689
2015	2179.1809888655425
2016	2231.076511601173
2017	2238.544214559787
2018	2271.7510189500126
2019	2306.2708569567803
2020	2348.7621868501424
2021	2398.1354565827487
2022	2370.9437785412997