Year	1=low to 6=high
2005	3.375
2006	3.219047619047619
2007	3.2499999999999996
2008	3.242857142857143
2009	3.276190476190476
2010	3.2916666666666665
2011	3.2976190476190474
2012	3.2607142857142857
2013	3.2595238095238086
2014	3.2488099999999998
2015	3.2178571428571425
2016	3.2273819047619043
2017	3.2142857142857157
2018	3.233333333333333
2019	3.249999904761904
2020	3.2369047619047615
2021	3.215476
2022	3.1916665714285712
2023	3.177381