Year	1=low to 6=high
2005	2.8552631578947367
2006	2.8875
2007	2.9
2008	2.8625
2009	2.8658536585365852
2010	2.8292682926829267
2011	2.8536585365853657
2012	2.7906976744186047
2013	2.784090909090909
2014	2.7906976744186047
2015	2.744186046511628
2016	2.686046511627907
2017	2.6704545454545454
2018	2.697674418604651
2019	2.6704545454545454
2020	2.625
2021	2.5930232558139537
2022	2.5795454545454546
2023	2.602272727272727