Year	1=low to 6=high
2005	3.054054054054054
2006	3.027027027027027
2007	3.0405405405405403
2008	3
2009	3.039473684210526
2010	3.0789473684210527
2011	3.0921052631578947
2012	3.0384615384615383
2013	3.0128205128205128
2014	3.0921052631578947
2015	3.0789473684210527
2016	3.0789473684210527
2017	3.0256410256410255
2018	3.026315789473684
2019	3.0128205128205128
2020	2.9871794871794872
2021	2.9743589743589745
2022	2.948717948717949
2023	2.948717948717949