Year	1=low to 6=high
2005	3.6710526315789473
2006	3.7125
2007	3.6625
2008	3.65
2009	3.6707317073170733
2010	3.6463414634146343
2011	3.6219512195121952
2012	3.5930232558139537
2013	3.647727272727273
2014	3.6744186046511627
2015	3.6744186046511627
2016	3.686046511627907
2017	3.6363636363636362
2018	3.686046511627907
2019	3.602272727272727
2020	3.6136363636363638
2021	3.627906976744186
2022	3.602272727272727
2023	3.590909090909091