Year	1=low to 6=high
2005	3.4
2006	3.4146341463414633
2007	3.4146341463414633
2008	3.4390243902439024
2009	3.4878048780487805
2010	3.451219512195122
2011	3.4404761904761907
2012	3.4047619047619047
2013	3.3372093023255816
2014	3.3292682926829267
2015	3.292682926829268
2016	3.223684210526316
2017	3.236842105263158
2018	3.1710526315789473
2019	3.1923076923076925
2020	3.223684210526316
2021	3.1973684210526314
2022	3.1025641025641026
2023	3.1025641025641026