Year	1=low to 6=high
2005	3.0166666666666666
2006	2.96875
2007	2.953125
2008	2.921875
2009	3
2010	3.0303030303030303
2011	3.0303030303030303
2012	2.9705882352941178
2013	2.985294117647059
2014	3.0303030303030303
2015	3
2016	3.015151515151515
2017	2.9411764705882355
2018	2.9696969696969697
2019	2.9705882352941178
2020	2.926470588235294
2021	2.893939393939394
2022	2.8529411764705883
2023	2.838235294117647