Year	kg per hectare
1992	2210.6
1993	2333.6
1994	2610.7
1995	1700.7
1996	824.2
1997	1186.4
1998	2148.6
1999	2270.7
2000	2122.4
2001	2319
2002	2921.1
2003	2769.5
2004	2931.6
2005	2926.7
2006	3288.4
2007	1300
2008	1100
2009	1600
2010	1700
2011	1366
2012	1490.8
2013	1643.1
2014	1738.3
2015	1909.5
2016	1880.2
2017	1843.8
2018	1496.8
2019	2214.1
2020	2191.4
2021	2096.2
2022	1874.6