Year	1=low to 6=high
2005	3.0833333333333335
2006	2.953125
2007	2.984375
2008	2.96875
2009	2.9696969696969697
2010	2.893939393939394
2011	2.909090909090909
2012	2.911764705882353
2013	2.926470588235294
2014	2.9696969696969697
2015	2.984848484848485
2016	2.9545454545454546
2017	2.8970588235294117
2018	2.893939393939394
2019	2.8088235294117645
2020	2.823529411764706
2021	2.878787878787879
2022	2.8823529411764706
2023	2.8823529411764706