Year	1=low to 6=high
2005	3.388888888888889
2006	3.391891891891892
2007	3.391891891891892
2008	3.4054054054054053
2009	3.3684210526315788
2010	3.3552631578947367
2011	3.4210526315789473
2012	3.3684210526315788
2013	3.276315789473684
2014	3.1973684210526314
2015	3.1710526315789473
2016	3.1216216216216215
2017	3.1184210526315788
2018	3.1216216216216215
2019	3.1184210526315788
2020	3.1052631578947367
2021	3.108108108108108
2022	3.026315789473684
2023	3.026315789473684