Year	kg per hectare
1961	799.3713244665355
1962	797.8144216051724
1963	793.6373129479476
1964	817.0837914020558
1965	797.7181519459101
1966	801.1809955166735
1967	849.0957814731499
1968	821.9362946348101
1969	857.0060476844315
1970	819.8617590871135
1971	832.1378950187705
1972	820.7407615225928
1973	844.4670254679409
1974	869.7546847866826
1975	912.550863430825
1976	928.8280788195165
1977	889.3998349166125
1978	907.7629894421362
1979	919.2275135738112
1980	930.8833440228319
1981	949.0975464848449
1982	907.5389166465014
1983	920.0997419786609
1984	875.0205082364627
1985	917.7447974136638
1986	918.063276106923
1987	920.4079294412463
1988	955.6385794367097
1989	933.2234543172651
1990	904.809186640041
1991	942.8217027413457
1992	843.9551959970365
1993	943.5578842513597
1994	829.2553804170809
1995	912.4533764168414
1996	989.3775751816878
1997	912.9297576534283
1998	961.610500643253
1999	1002.1232931957323
2000	958.7797605884763
2001	1008.1279070762746
2002	1024.3144563480528
2003	1004.9570699769066
2004	1047.4493635892775
2005	1025.8791868158316
2006	1130.5826113823284
2007	1149.5091462063936
2008	1130.660783469296
2009	1238.9856516000548
2010	1274.2568663427232
2011	1223.9221103861778
2012	1366.9623227264008
2013	1306.0492208450314
2014	1360.7177026863637
2015	1419.3308239586102
2016	1360.0130529426935
2017	1415.7267318340748
2018	1455.4466651115376
2019	1502.3431085961709
2020	1533.4456441597142
2021	1543.144149641128
2022	1528.7301947514843