Year	kg per hectare
2000	8021.4
2001	8218.1
2002	8500.9
2003	8530.7
2004	9184.9
2005	8649.5
2006	8373.3
2007	8637.7
2008	8885.8
2009	9710
2010	9348.1
2011	9009
2012	8666.3
2013	9212.5
2014	9435.4
2015	9842.2
2016	6984.8
2017	9050.7
2018	7983.1
2019	8988.5
2020	8430.6
2021	7906.2
2022	8603.5