Year	1=low to 6=high
2005	3.183333333333333
2006	3.109375
2007	3.15625
2008	3.140625
2009	3.121212121212121
2010	3.1515151515151514
2011	3.121212121212121
2012	3.073529411764706
2013	3.073529411764706
2014	3.0757575757575757
2015	3.0454545454545454
2016	3
2017	2.9558823529411766
2018	3
2019	2.985294117647059
2020	3.014705882352941
2021	3.0757575757575757
2022	3.0441176470588234
2023	3.073529411764706