Year	1=low to 6=high
2005	3.1973684210526314
2006	3.1625
2007	3.2125
2008	3.25
2009	3.1951219512195124
2010	3.182926829268293
2011	3.2195121951219514
2012	3.1744186046511627
2013	3.1931818181818183
2014	3.244186046511628
2015	3.244186046511628
2016	3.116279069767442
2017	3.0681818181818183
2018	3.0697674418604652
2019	3.034090909090909
2020	3.0454545454545454
2021	2.9767441860465116
2022	3
2023	2.965909090909091