Year	1=low to 6=high
2005	3.086666666666667
2006	3.015625
2007	3.0406249999999995
2008	3.034375
2009	3.048484848484848
2010	3.0848484848484854
2011	3.1272727272727274
2012	3.0999999999999996
2013	3.091176470588235
2014	3.1090909090909093
2015	3.115151515151515
2016	3.106060606060606
2017	3.082352941176471
2018	3.1303030303030313
2019	3.1147058823529403
2020	3.138235294117647
2021	3.1696969696969695
2022	3.1676470588235297
2023	3.1764705882352944