Year	1=low to 6=high
2005	3.533333333333333
2006	3.546875
2007	3.578125
2008	3.578125
2009	3.606060606060606
2010	3.606060606060606
2011	3.606060606060606
2012	3.588235294117647
2013	3.5588235294117645
2014	3.5757575757575757
2015	3.4393939393939394
2016	3.3484848484848486
2017	3.3088235294117645
2018	3.3636363636363638
2019	3.3088235294117645
2020	3.323529411764706
2021	3.393939393939394
2022	3.338235294117647
2023	3.3970588235294117