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