Year	1=low to 6=high
2005	2.7333333333333334
2006	2.671875
2007	2.65625
2008	2.65625
2009	2.6515151515151514
2010	2.6363636363636362
2011	2.6515151515151514
2012	2.588235294117647
2013	2.588235294117647
2014	2.590909090909091
2015	2.606060606060606
2016	2.6363636363636362
2017	2.6029411764705883
2018	2.6363636363636362
2019	2.6029411764705883
2020	2.6176470588235294
2021	2.6666666666666665
2022	2.5441176470588234
2023	2.588235294117647