Year	1=low to 6=high
2005	3.1052631578947367
2006	2.9473684210526314
2007	2.9473684210526314
2008	2.9210526315789473
2009	2.9
2010	2.975
2011	3.175
2012	3.175
2013	3.125
2014	3.225
2015	3.275
2016	3.225
2017	3.275
2018	3.3
2019	3.375
2020	3.375
2021	3.325
2022	3.375
2023	3.375