Year	1=low to 6=high
2005	3.2252252252252247
2006	3.2351351351351347
2007	3.2477477477477477
2008	3.2135135135135138
2009	3.2368421052631575
2010	3.210526315789474
2011	3.2149122807017547
2012	3.1923076923076925
2013	3.2136752136752142
2014	3.223684561403508
2015	3.214912543859649
2016	3.1666666666666674
2017	3.1367521367521367
2018	3.1622807017543857
2019	3.106837606837606
2020	3.1153846153846145
2021	3.1282051282051286
2022	3.153846128205128
2023	3.1709401538461535