Year	kg per hectare
1992	1933.2
1993	2102
1994	1753.4
1995	1852.8
1996	2417.2
1997	2529.4
1998	2448.4
1999	2020.8
2000	2707.5
2001	2505
2002	2765.9
2003	3037
2004	3254.9
2005	2940.2
2006	1929.4
2007	3007.1
2008	3348.2
2009	3449.6
2010	2763.5
2011	3029.9
2012	4015.3
2013	3687.8
2014	3975.2
2015	4564.6
2016	3859.8
2017	4230.2
2018	3094.1
2019	3801.6
2020	4734.2
2021	3937.2
2022	4210.2