Year	1=low to 6=high
2005	3.75
2006	3.5
2007	3.5
2008	3.5
2009	3.5
2010	3.5
2011	3.25
2012	3.5
2013	3.5
2014	3.5
2015	3.25
2016	3
2017	2.75
2018	2.75
2019	3
2020	2.75
2021	2.5
2022	2.75
2023	2.75