Year	1=low to 6=high
2005	3.2074074074074064
2006	3.1894144144144154
2007	3.2042792792792785
2008	3.2
2009	3.1910087719298246
2010	3.1910087719298246
2011	3.211622807017544
2012	3.202850877192983
2013	3.191447368421053
2014	3.1945188596491225
2015	3.1853078947368427
2016	3.157883243243244
2017	3.1206140350877205
2018	3.145495495495496
2019	3.109210552631579
2020	3.111184210526317
2021	3.1168918918918918
2022	3.0899123421052637
2023	3.0870614473684204