Year	1=low to 6=high
2005	4.25
2006	4.125
2007	4.3125
2008	4.3125
2009	4.3125
2010	4.3125
2011	4.3125
2012	4.3125
2013	4.3125
2014	4.3125
2015	4.1875
2016	4.142857142857143
2017	4.142857142857143
2018	4.142857142857143
2019	4.142857142857143
2020	4.071428571428571
2021	4
2022	4
2023	3.857142857142857