Year	1=low to 6=high
2005	2.5
2006	2.5
2007	2.5
2008	2.5
2009	2.5
2010	2.5
2011	2.5
2012	2.5
2013	2.5
2014	2.25
2015	2.25
2016	2.25
2017	2
2018	2.25
2019	2.25
2020	2.25
2021	2.25
2022	2.25
2023	2.25