Year	1=low to 6=high
2005	3.2
2006	3.3
2007	3.4
2008	3.4
2009	3.4
2010	3.4
2011	3.5
2012	3.4375
2013	3.4375
2014	3.4375
2015	3.4375
2016	3.4375
2017	3.4375
2018	3.4375
2019	3.4375
2020	3.388888888888889
2021	3.388888888888889
2022	3.388888888888889
2023	3.3333333333333335