Year	1=low to 6=high
2005	2.8055555555555554
2006	2.75
2007	2.7222222222222223
2008	2.6944444444444446
2009	2.611111111111111
2010	2.5555555555555554
2011	2.611111111111111
2012	2.5789473684210527
2013	2.526315789473684
2014	2.5555555555555554
2015	2.5
2016	2.5
2017	2.4210526315789473
2018	2.5
2019	2.5
2020	2.5
2021	2.473684210526316
2022	2.5
2023	2.3947368421052633