Year	1=low to 6=high
2005	3.725
2006	3.731707317073171
2007	3.7439024390243905
2008	3.658536585365854
2009	3.707317073170732
2010	3.707317073170732
2011	3.6785714285714284
2012	3.7142857142857144
2013	3.6744186046511627
2014	3.6219512195121952
2015	3.597560975609756
2016	3.5921052631578947
2017	3.5789473684210527
2018	3.5657894736842106
2019	3.6025641025641026
2020	3.5921052631578947
2021	3.539473684210526
2022	3.423076923076923
2023	3.4358974358974357