Year	kg per hectare
1961	858.5243550267994
1962	894.1165490567444
1963	883.0268719835096
1964	912.3378714563596
1965	880.1118776460274
1966	873.7666732821482
1967	931.204274931748
1968	910.0258787775882
1969	962.6244248731839
1970	891.9605573955505
1971	910.894947745463
1972	939.7420677634746
1973	906.0861904133477
1974	974.9931682897736
1975	983.8744326419138
1976	1029.8943135316608
1977	968.7419856999195
1978	1011.4157741995358
1979	1013.0626788025141
1980	1082.5565296203906
1981	1083.020091245
1982	955.4458110532112
1983	990.3610116286604
1984	900.2758044056385
1985	945.3350183493549
1986	987.3174710843713
1987	963.1121657540773
1988	1047.2335319728056
1989	897.8375993251353
1990	918.9536768816574
1991	1039.8992953510904
1992	973.3742420075932
1993	1077.9458634695275
1994	921.048261438967
1995	907.7333969843312
1996	960.2122668926612
1997	884.7097817428524
1998	989.0886987169819
1999	958.8629230885279
2000	895.0986429686575
2001	989.4170473075213
2002	1009.6484674879703
2003	1037.2607333107237
2004	1032.3894128236227
2005	1023.0873453006615
2006	1142.6730121997243
2007	1129.3659964331555
2008	1067.6349918412975
2009	1232.285263506827
2010	1204.4513465005184
2011	1188.5348123741555
2012	1356.5098399198366
2013	1271.8272967193382
2014	1296.3837122414404
2015	1372.6400925911323
2016	1283.7216004139484
2017	1342.1929247503372
2018	1340.0745219389612
2019	1447.2983206069605
2020	1461.807134927827
2021	1419.9474141757319
2022	1443.203271957583