Year	kg per hectare
1961	1107.551311955613
1962	1238.671911158814
1963	1415.9274023709238
1964	1274.5789736177753
1965	1308.1596741866886
1966	1520.630110166182
1967	1541.2308822116433
1968	1392.4300563518589
1969	1507.7648921628095
1970	1488.9224712645
1971	1803.2263158513265
1972	1762.6903820598648
1973	1564.464564437302
1974	1559.4037151412974
1975	1890.0851108030545
1976	2091.1837322952974
1977	2028.7138870918168
1978	2068.5757730231926
1979	2154.3026814781456
1980	2112.027494398259
1981	2169.189036173898
1982	2356.1670111511294
1983	2118.7929296727143
1984	2322.990161663005
1985	2066.1178593881823
1986	2401.6238758385907
1987	2346.776579950999
1988	2453.272320686899
1989	2128.464225502272
1990	2449.0455136939772
1991	2479.1138017975177
1992	1896.7973335426695
1993	1845.2492831794148
1994	1619.2430050261648
1995	1518.8219375290173
1996	1540.9696805996275
1997	1878.1732878069965
1998	1624.6927596215692
1999	1722.1642893878402
2000	1730.5560356565409
2001	2056.095935973983
2002	2104.476483927764
2003	1922.3541574180497
2004	2117.9657037591173
2005	2097.8370969928724
2006	2146.2182417521703
2007	2079.857437325536
2008	2505.8841122074195
2009	2432.2530214620547
2010	2155.6866174893844
2011	2648.892971355611
2012	2231.408542277495
2013	2669.031874135547
2014	2795.5421438515914
2015	2777.7796804073732
2016	2965.3290304506245
2017	3043.3215173430353
2018	2996.7952909916253
2019	3064.9718617647445
2020	3051.23283390206
2021	3094.2875892799434
2022	3279.5456967200107