Year	1=low to 6=high
2005	3.1216216216216215
2006	3.054054054054054
2007	3.0675675675675675
2008	3.054054054054054
2009	3.0657894736842106
2010	3.013157894736842
2011	3.039473684210526
2012	3.051282051282051
2013	3.0641025641025643
2014	3.0789473684210527
2015	3.0921052631578947
2016	3.0657894736842106
2017	3.0256410256410255
2018	3.026315789473684
2019	2.9743589743589745
2020	2.9871794871794872
2021	3.0256410256410255
2022	3.051282051282051
2023	3.0384615384615383