Year	kg per hectare
1992	1403.8
1993	2161.3
1994	1597.1
1995	1687.4
1996	2178.5
1997	1992
1998	1627
1999	1251.3
2000	2114.7
2001	2037
2002	2024
2003	1921.7
2004	2330.3
2005	2694.4
2006	2209.9
2007	3009.1
2008	2792.8
2009	2760.5
2010	2464.2
2011	2598.9
2012	3412
2013	3135.6
2014	3669.6
2015	4381.6
2016	2658.4
2017	3967.3
2018	2624.9
2019	4458.6
2020	4411.5
2021	3502.4
2022	4224.5