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