Year	1=low to 6=high
2005	4.5
2006	4.5
2007	4
2008	3.5
2009	3.5
2010	3.5
2011	3.5
2012	3
2013	2.5
2014	2.5
2015	3
2016	2.5
2017	3
2018	3
2019	3
2020	3
2021	3
2022	2
2023	2.5