Year	1=low to 6=high
2005	3.1507936507936507
2006	3.1384615384615384
2007	3.1538461538461537
2008	3.1538461538461537
2009	3.208955223880597
2010	3.2388059701492535
2011	3.2246376811594204
2012	3.176056338028169
2013	3.1527777777777777
2014	3.173611111111111
2015	3.138888888888889
2016	3.119718309859155
2017	3.076388888888889
2018	3.084507042253521
2019	3.0684931506849313
2020	3.0273972602739727
2021	3.0208333333333335
2022	3
2023	2.9864864864864864