Year	1=low to 6=high
2005	2.9864864864864864
2006	2.986111111111111
2007	2.9594594594594597
2008	2.9864864864864864
2009	2.986842105263158
2010	2.973684210526316
2011	2.960526315789474
2012	2.8974358974358974
2013	2.8846153846153846
2014	2.9078947368421053
2015	2.9342105263157894
2016	2.973684210526316
2017	2.9358974358974357
2018	2.9473684210526314
2019	2.923076923076923
2020	2.9615384615384617
2021	3
2022	3.0256410256410255
2023	3.0641025641025643