Year	1=low to 6=high
2005	3.111111111111111
2006	3.1216216216216215
2007	3.1216216216216215
2008	3.0945945945945947
2009	3.1315789473684212
2010	3.1447368421052633
2011	3.1315789473684212
2012	3.1052631578947367
2013	3.0789473684210527
2014	3.1184210526315788
2015	3.1184210526315788
2016	3.1486486486486487
2017	3.0789473684210527
2018	3.1216216216216215
2019	3.0789473684210527
2020	3.039473684210526
2021	3.0135135135135136
2022	2.973684210526316
2023	2.960526315789474