Year	1=low to 6=high
2005	2.5
2006	2
2007	2
2008	2
2009	3
2010	3
2011	3
2012	2.5
2013	2.5
2014	3
2015	3
2016	3
2017	3
2018	2.5
2019	2.5
2020	2.5
2021	2.5
2022	2.5
2023	2.5