Year	1=low to 6=high
2005	3.827272727272727
2006	3.8482142857142856
2007	3.811320754716981
2008	3.69811320754717
2009	3.7222222222222223
2010	3.712962962962963
2011	3.690909090909091
2012	3.7142857142857144
2013	3.675438596491228
2014	3.5961538461538463
2015	3.576923076923077
2016	3.5510204081632653
2017	3.5510204081632653
2018	3.5408163265306123
2019	3.66
2020	3.6145833333333335
2021	3.5729166666666665
2022	3.4693877551020407
2023	3.479591836734694