Year	1=low to 6=high
2005	4
2006	4
2007	4
2008	3.5
2009	3.5
2010	3.5
2011	4
2012	3.5
2013	3
2014	2
2015	3
2016	3
2017	3.5
2018	3.5
2019	3.5
2020	3.5
2021	3.5
2022	3
2023	3.5