Year	1=low to 6=high
2005	3.4444444444444446
2006	3.4444444444444446
2007	3.4444444444444446
2008	3.4444444444444446
2009	3.5
2010	3.388888888888889
2011	3.388888888888889
2012	3.388888888888889
2013	3.5
2014	3.5
2015	3.4444444444444446
2016	3.4375
2017	3.4375
2018	3.4375
2019	3.375
2020	3.3125
2021	3.25
2022	3.1875
2023	3.125