Year	kg per hectare
1961	1072.0203983523143
1962	1036.0895099532304
1963	1086.7916978956903
1964	1105.628401584323
1965	1074.3626398223805
1966	1023.9546635963909
1967	1103.4685601236285
1968	1120.753146710985
1969	1140.1787730687706
1970	1117.1012700257706
1971	1087.1150503868378
1972	1057.5027095052515
1973	1146.6799086533536
1974	1133.6486093455537
1975	1207.6171449674084
1976	1197.9233878835455
1977	1197.5528054288566
1978	1230.4971702312075
1979	1236.355847747847
1980	1325.1347469900743
1981	1329.9297032308948
1982	1318.3136126501608
1983	1366.3751546211004
1984	1322.032440463234
1985	1327.2664042786919
1986	1318.2220660572698
1987	1344.1981291369336
1988	1329.5158569883981
1989	1388.897244977408
1990	1380.073328223681
1991	1372.9016254869725
1992	1318.8264876589485
1993	1394.6324289459867
1994	1284.8450137149375
1995	1371.5666651394936
1996	1433.3020821608516
1997	1367.340113896475
1998	1430.3924104590874
1999	1561.862202537072
2000	1601.1297824838935
2001	1595.2554076861659
2002	1612.899596675265
2003	1577.0594580691868
2004	1644.0659504272614
2005	1621.0555111336887
2006	1752.3104347958613
2007	1815.7329066111397
2008	1821.774557289168
2009	1900.927743749435
2010	1910.8324355567283
2011	1868.0460044905326
2012	1985.4432858247437
2013	1913.9117690239514
2014	1956.487201491661
2015	2030.1295161220623
2016	1933.075803159975
2017	2018.6323185833019
2018	2049.679252653918
2019	2084.181326508739
2020	2116.7072152359056
2021	2138.365145354296
2022	2123.7290128290383