Year	1=low to 6=high
2005	4
2006	4
2007	4
2008	4
2009	4
2010	3.5
2011	3
2012	3
2013	3
2014	2.5
2015	2.5
2016	2.5
2017	2.5
2018	2.5
2019	2.5
2020	2.5
2021	2.5
2022	2.5
2023	2.5