Year	kg per hectare
2006	4455.2
2007	3232.6
2008	4570.6
2009	4601.1
2010	4958.8
2011	4751.4
2012	3701.7
2013	5157.8
2014	5960.6
2015	4787.3
2016	6165.9
2017	3967.9
2018	6132.1
2019	6127.3
2020	6570.2
2021	5769.9
2022	4638