Year	1=low to 6=high
2005	3
2006	3
2007	3.5
2008	3.5
2009	3.5
2010	3.5
2011	3.5
2012	3
2013	3
2014	3
2015	2.5
2016	2.5
2017	2.5
2018	2
2019	2
2020	2
2021	2
2022	1.5
2023	1.5