Year	kg per hectare
1961	1054.683998739639
1962	1042.7914097086816
1963	1081.6660559938132
1964	1098.2213169907127
1965	1071.8698058660113
1966	1027.1362712819052
1967	1105.859068741599
1968	1120.9050217157087
1969	1140.9352594375239
1970	1094.3523590863774
1971	1082.1641002866986
1972	1074.4260800116238
1973	1117.2050106808874
1974	1141.0084556902218
1975	1189.4622578155743
1976	1188.2495027457408
1977	1179.353270402295
1978	1225.0667927323736
1979	1221.8803817651637
1980	1340.915083039469
1981	1347.6028780893614
1982	1312.8853827648145
1983	1362.134440102236
1984	1310.3722778086758
1985	1334.5517919066813
1986	1338.2001058383973
1987	1341.5933562963364
1988	1367.111128366834
1989	1345.0131496843926
1990	1367.5179840578323
1991	1373.5410166285312
1992	1345.3086654001665
1993	1442.5230772218897
1994	1330.564543600053
1995	1415.463834809279
1996	1478.6362923637428
1997	1399.443066638864
1998	1471.6210902398327
1999	1575.5604060622456
2000	1618.4130543161318
2001	1634.074887801924
2002	1664.5822010857855
2003	1633.5252756165653
2004	1693.2822008648611
2005	1668.8796851658708
2006	1804.4454189478447
2007	1850.279841071816
2008	1831.2382894019515
2009	1947.3073824174733
2010	1946.5377690723406
2011	1909.4662406905538
2012	2011.0539246416413
2013	1959.3444586647809
2014	1980.8539226236605
2015	2084.064853195443
2016	1978.9143084749492
2017	2059.435365248666
2018	2087.689378109371
2019	2162.9923346121036
2020	2184.817339340856
2021	2174.74025408939
2022	2160.8872227913484