Year	1=low to 6=high
2005	3.73
2006	3.784313725490196
2007	3.7450980392156863
2008	3.715686274509804
2009	3.792452830188679
2010	3.7641509433962264
2011	3.727272727272727
2012	3.719298245614035
2013	3.7586206896551726
2014	3.7758620689655173
2015	3.7586206896551726
2016	3.780701754385965
2017	3.75
2018	3.763157894736842
2019	3.7033898305084745
2020	3.6982758620689653
2021	3.7017543859649122
2022	3.6864406779661016
2023	3.6779661016949152