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