Year	1=low to 6=high
2005	2.816666666666667
2006	2.796875
2007	2.828125
2008	2.796875
2009	2.8181818181818183
2010	2.803030303030303
2011	2.772727272727273
2012	2.7205882352941178
2013	2.7058823529411766
2014	2.757575757575758
2015	2.712121212121212
2016	2.742424242424242
2017	2.6911764705882355
2018	2.696969696969697
2019	2.676470588235294
2020	2.661764705882353
2021	2.6818181818181817
2022	2.676470588235294
2023	2.676470588235294