Year	1=low to 6=high
2005	3.1210526315789475
2006	3.0824999999999996
2007	3.1050000000000004
2008	3.1025000000000005
2009	3.117073170731707
2010	3.156097560975611
2011	3.182926829268293
2012	3.1488372093023265
2013	3.125
2014	3.1488372093023256
2015	3.144186046511628
2016	3.1232558139534885
2017	3.0931818181818174
2018	3.127906976744186
2019	3.113636363636363
2020	3.1454545454545455
2021	3.1511627906976742
2022	3.1500000000000004
2023	3.1477272727272734