Year	1=low to 6=high
2005	3.4000000000000004
2006	3.388888888888889
2007	3.4333333333333327
2008	3.4222222222222216
2009	3.433333333333333
2010	3.411111111111111
2011	3.4
2012	3.3777777777777778
2013	3.3555555555555556
2014	3.322222222222222
2015	3.3000000000000003
2016	3.3125
2017	3.3125
2018	3.3250000000000006
2019	3.2875
2020	3.2624999999999997
2021	3.2125000000000004
2022	3.1875000000000004
2023	3.125