Year	kg per hectare
1961	924.1117370249333
1962	931.5067146701999
1963	934.0151055325634
1964	879.7508635797211
1965	869.5845221987487
1966	879.8660160842062
1967	1114.8324013217573
1968	898.701753874313
1969	939.093151430928
1970	948.8752771901096
1971	1071.2359778115613
1972	1109.947358570481
1973	934.0935972842802
1974	1172.2352037196035
1975	1145.8562062592532
1976	1152.636594515139
1977	1210.7877487078201
1978	1204.166972464969
1979	1163.2419421246561
1980	1249.2829530313145
1981	1424.3733589626572
1982	1174.40141916625
1983	1011.5304579168127
1984	955.8229023314678
1985	1128.2946150891244
1986	1131.54761824297
1987	1115.3296535828101
1988	1175.4780965734408
1989	1289.9290943827814
1990	1251.4905336781299
1991	1219.2129381783213
1992	904.2004672138318
1993	1259.0831437025608
1994	1156.5314523090378
1995	1025.9173460546108
1996	1266.6139630927667
1997	1127.2700499943362
1998	1144.4366351756737
1999	1194.4695282228024
2000	1292.8715436626378
2001	1262.4481662848686
2002	1264.6916286992514
2003	1150.1766472641339
2004	1296.2991680356483
2005	1173.8548654193128
2006	1296.3988257790486
2007	1324.8067666857078
2008	1348.040249899048
2009	1425.6754602908527
2010	1553.3933354310038
2011	1492.8909896770667
2012	1653.4722483608655
2013	1539.1114739467225
2014	1653.295812769374
2015	1639.943869725441
2016	1510.0427112890093
2017	1771.1758281642526
2018	1737.643457545042
2019	1727.1815306561639
2020	1864.0284593581698
2021	1923.422311681382
2022	1841.8584877572448