Year	1=low to 6=high
2005	3.272727272727273
2006	3.2055555555555553
2007	3.2121212121212124
2008	3.2363636363636363
2009	3.303030303030303
2010	3.303030303030303
2011	3.256410256410256
2012	3.2261904761904754
2013	3.211111111111111
2014	3.222221555555555
2015	3.188888222222222
2016	3.190475
2017	3.1547619047619038
2018	3.1547619047619038
2019	3.1071427857142857
2020	3.095238095238094
2021	3.0714286428571427
2022	3.059523857142857
2023	3.0595237857142856