Year	1=low to 6=high
2005	3.1556306306306303
2006	3.153378378378379
2007	3.1772522522522526
2008	3.1621621621621627
2009	3.1767543859649123
2010	3.1809210526315788
2011	3.204605263157895
2012	3.173931623931624
2013	3.170940170940171
2014	3.186404561403509
2015	3.172149824561403
2016	3.136842105263158
2017	3.1017094017094022
2018	3.1285087719298255
2019	3.100000000000001
2020	3.1091880341880356
2021	3.115598307692307
2022	3.127991487179488
2023	3.1397436410256407