Year	1=low to 6=high
2005	3.152173913043478
2006	3.14
2007	3.08
2008	3.08
2009	3.2115384615384617
2010	3.2115384615384617
2011	3.125
2012	3.066666666666667
2013	3.0483870967741935
2014	2.935483870967742
2015	2.903225806451613
2016	2.806451612903226
2017	2.734375
2018	2.774193548387097
2019	2.796875
2020	2.78125
2021	2.7419354838709675
2022	2.65625
2023	2.609375