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