Year	1=low to 6=high
2005	3.3157894736842106
2006	3.3947368421052633
2007	3.4473684210526314
2008	3.4473684210526314
2009	3.4
2010	3.375
2011	3.45
2012	3.425
2013	3.4
2014	3.25
2015	3.225
2016	3.125
2017	3.25
2018	3.225
2019	3.25
2020	3.275
2021	3.3
2022	3.275
2023	3.325