Year	kg per hectare
1961	1884.2
1962	2511.2
1963	1883
1964	1788.7
1965	1866.7
1966	2075
1967	2325.6
1968	2375.4
1969	2402.7
1970	2424.2
1971	2333.3
1972	2727.6
1973	2631.6
1974	2614.4
1975	2614.4
1976	2614.4
1977	2614.4
1978	2614.4
1979	2614.4
1980	2500
1981	2500
1982	2500
1983	2500
1984	2727.3
1985	2500
1986	2561
1987	2561
1988	2619
1989	2619
1990	2674.4
1991	2625
1992	2571.4
1993	2666.7
1994	2600
1995	2750
1996	2666.7
1997	2600
1998	2600
1999	2600
2000	2608.7
2001	2604.2
2002	2626.5
2003	2630
2004	2659.6
2005	2736.8
2006	2700
2007	2666.7
2008	2740.9
2009	2827.1
2010	2884.2
2011	2987.6
2012	3200
2013	2833.3
2014	2700
2015	2695.6
2016	2755.8
2017	2815.6
2018	2835.6
2019	2787.6
2020	2765.6
2021	2759.3
2022	2753