Year	1=low to 6=high
2005	3.2837837837837838
2006	3.294594594594595
2007	3.355855855855856
2008	3.364864864864865
2009	3.385964912280702
2010	3.3815789473684212
2011	3.403508771929824
2012	3.3803418803418808
2013	3.3547008547008543
2014	3.3377189473684212
2015	3.2763157017543856
2016	3.18859649122807
2017	3.1367521367521367
2018	3.149122807017544
2019	3.1367521367521367
2020	3.14957264957265
2021	3.1623931538461543
2022	3.158119692307692
2023	3.18803417948718