Year	1=low to 6=high
2005	3.4
2006	3.3035714285714284
2007	3.3867924528301887
2008	3.3867924528301887
2009	3.3703703703703702
2010	3.3703703703703702
2011	3.290909090909091
2012	3.2589285714285716
2013	3.263157894736842
2014	3.2115384615384617
2015	3.173076923076923
2016	3.173469387755102
2017	3.142857142857143
2018	3.0918367346938775
2019	3.1
2020	3.0625
2021	3.09375
2022	3.1122448979591835
2023	3.13265306122449