Year	1=low to 6=high
2005	2.4782608695652173
2006	2.42
2007	2.42
2008	2.46
2009	2.5
2010	2.5
2011	2.5535714285714284
2012	2.5166666666666666
2013	2.4838709677419355
2014	2.467741935483871
2015	2.467741935483871
2016	2.5
2017	2.453125
2018	2.4838709677419355
2019	2.453125
2020	2.453125
2021	2.4193548387096775
2022	2.328125
2023	2.34375