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