Year	1=low to 6=high
2005	3.276719576719576
2006	3.2525641025641034
2007	3.2706410256410243
2008	3.266153846153846
2009	3.2768656716417905
2010	3.281592039800995
2011	3.2768115942028984
2012	3.243779342723005
2013	3.22962962962963
2014	3.231829629629631
2015	3.2119218055555563
2016	3.186971971830985
2017	3.1569444444444446
2018	3.1679577464788733
2019	3.160502273972603
2020	3.1599315068493157
2021	3.1624999722222227
2022	3.141891891891892
2023	3.142117135135135