Year	1=low to 6=high
2005	3.1556306306306303
2006	3.153378378378379
2007	3.177252252252252
2008	3.1621621621621627
2009	3.1767543859649123
2010	3.1809210526315788
2011	3.204605263157895
2012	3.1739316239316233
2013	3.1709401709401708
2014	3.1864045614035086
2015	3.172149824561404
2016	3.136842105263159
2017	3.1017094017094027
2018	3.128508771929826
2019	3.1000000000000005
2020	3.109188034188035
2021	3.115598307692308
2022	3.127991487179487
2023	3.139743641025641