Year	1=low to 6=high
2005	3.4375
2006	3.425
2007	3.474999999999999
2008	3.462499999999999
2009	3.475
2010	3.4625
2011	3.4499999999999997
2012	3.425
2013	3.3874999999999997
2014	3.35
2015	3.325
2016	3.3428571428571425
2017	3.3428571428571425
2018	3.342857142857143
2019	3.3000000000000003
2020	3.2714285714285714
2021	3.2142857142857144
2022	3.185714285714286
2023	3.1142857142857143