Year	1=low to 6=high
2005	3.627272727272728
2006	3.636309523809524
2007	3.638364779874214
2008	3.6094339622641503
2009	3.6080246913580236
2010	3.5802469135802473
2011	3.545454545454546
2012	3.5238095238095233
2013	3.491228070175439
2014	3.419871538461538
2015	3.40064096153846
2016	3.357143197278911
2017	3.35374149659864
2018	3.3333333333333335
2019	3.38000008
2020	3.3680555555555554
2021	3.3437500416666666
2022	3.2789116326530614
2023	3.268707530612244