Year	1=low to 6=high
2005	3.224000000000001
2006	3.1980392156862756
2007	3.2176470588235304
2008	3.2294117647058833
2009	3.228301886792453
2010	3.2641509433962264
2011	3.2563636363636363
2012	3.242105263157895
2013	3.224137931034483
2014	3.2275862068965515
2015	3.224137931034483
2016	3.2017543859649127
2017	3.174137931034481
2018	3.205263157894737
2019	3.2067796610169483
2020	3.225862068965516
2021	3.235087719298246
2022	3.240677966101696
2023	3.245762711864406