Year	1=low to 6=high
2005	4
2006	4
2007	4
2008	3.5
2009	3.5
2010	3
2011	3
2012	3
2013	3
2014	3
2015	2.5
2016	3
2017	3
2018	3
2019	3
2020	3
2021	3
2022	3
2023	3