Year	kg per hectare
1992	2782.6
1993	2471.6
1994	1813.2
1995	1630.8
1996	2158.2
1997	2373
1998	2493.5
1999	2483.6
2000	2669.3
2001	2866.9
2002	2665.4
2003	2774.2
2004	2876.5
2005	2677.9
2006	2550.6
2007	2512.9
2008	2380.2
2009	3034.2
2010	2610.5
2011	2603.1
2012	2367.1
2013	2904
2014	2276.3
2015	2999
2016	3104.2
2017	3093.4
2018	3162.2
2019	3233.9
2020	3260.4
2021	2334.9
2022	3249.4