Year	kg per hectare
1961	804.1583848948379
1962	1102.2990783692092
1963	1032.2898223470036
1964	978.9029221117073
1965	1020.4943886453034
1966	914.3049627789818
1967	998.2055664493789
1968	1160.8835705450788
1969	1072.9123765071809
1970	1014.0204648398786
1971	1104.4045231183457
1972	1223.0540355614633
1973	984.8504214885387
1974	1109.528891610502
1975	1146.433454377571
1976	1247.228240074486
1977	1041.3406852683256
1978	1192.3272535405147
1979	1148.7309377950721
1980	1245.8644083184088
1981	1137.9780621706075
1982	1267.8853362848336
1983	1126.7125706602064
1984	1173.3745616881506
1985	1296.0871230983118
1986	1435.423787303747
1987	1303.7180875712368
1988	1553.6484015407275
1989	1293.532055102502
1990	1471.1481665269544
1991	1669.198477604494
1992	1553.5392519712352
1993	1599.2802057123124
1994	1866.7528587974602
1995	1778.1992318448108
1996	1983.7271976619188
1997	1857.3174364311758
1998	1936.723775945093
1999	1888.9916815410995
2000	1769.8238197343235
2001	1972.2233046214585
2002	2274.5966697820604
2003	2338.377572331943
2004	2290.669841283276
2005	2135.2586623428583
2006	2430.1816954350293
2007	2190.2147758297892
2008	2112.895803005148
2009	2448.5935170811863
2010	2235.143541783963
2011	2264.4516854572657
2012	2234.66639116923
2013	2412.149066751701
2014	2332.1278307890097
2015	2630.7463760977535
2016	2519.2224567017593
2017	2357.0233861432953
2018	2385.4852234157456
2019	2435.576489851895
2020	2210.428247066076
2021	2399.6231117454913
2022	2346.2827389445715