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