Year	1=low to 6=high
2005	3.138888888888889
2006	3.1095890410958904
2007	3.1095890410958904
2008	3.1486486486486487
2009	3.1447368421052633
2010	3.151315789473684
2011	3.090909090909091
2012	3.0443037974683542
2013	3.00625
2014	2.973333333333333
2015	2.973333333333333
2016	2.9722222222222223
2017	2.952054794520548
2018	2.9652777777777777
2019	2.945945945945946
2020	2.9722222222222223
2021	3.0140845070422535
2022	3.0136986301369864
2023	3.041095890410959