Year	1=low to 6=high
2005	3.1685714285714286
2006	3.1194444444444454
2007	3.1416666666666666
2008	3.1621621621621627
2009	3.1473684210526316
2010	3.1842105263157903
2011	3.2131578947368418
2012	3.2210526315789476
2013	3.2131578947368418
2014	3.223684210526315
2015	3.228947368421052
2016	3.205405405405405
2017	3.184210526315788
2018	3.235135135135135
2019	3.213157894736841
2020	3.236842105263157
2021	3.2513513513513512
2022	3.244736842105263
2023	3.250000000000001