Year	kg per hectare
1993	4019.5
1994	4091.7
1995	4179.3
1996	4192.7
1997	4132.7
1998	3968.1
1999	4346.6
2000	3906
2001	4508.6
2002	4324
2003	3940.8
2004	5443.6
2005	4741.6
2006	4159
2007	4522
2008	5362.8
2009	5073.9
2010	4695.8
2011	5592.6
2012	4529.5
2013	5309.3
2014	6219.8
2015	5880.6
2016	6317
2017	5497.5
2018	5206.9
2019	5653.2
2020	6042.7
2021	6113
2022	5929.6