Year	1=low to 6=high
2005	3.3125
2006	3.375
2007	3.375
2008	3.4375
2009	3.4375
2010	3.4375
2011	3.4375
2012	3.4375
2013	3.4375
2014	3.4375
2015	3.4375
2016	3.4285714285714284
2017	3.357142857142857
2018	3.357142857142857
2019	3.357142857142857
2020	3.4285714285714284
2021	3.2857142857142856
2022	3.2857142857142856
2023	3.2142857142857144