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