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