Year	kg per hectare
1993	3775.8
1994	4304.7
1995	4116.4
1996	4014.1
1997	4388.2
1998	4054.9
1999	3857.4
2000	2709.9
2001	3889.7
2002	3899.7
2003	3136
2004	4641.8
2005	4511.8
2006	3996.3
2007	3561.2
2008	5175.3
2009	4331.5
2010	3737.3
2011	5009
2012	3829.1
2013	4490.4
2014	6038.7
2015	5079.6
2016	6430.4
2017	4856
2018	5409.7
2019	5336
2020	6129.8
2021	5976.8
2022	4754.5