Year	1=low to 6=high
2005	2.9810810810810806
2006	2.970270270270271
2007	2.97027027027027
2008	2.948648648648649
2009	2.9631578947368418
2010	2.9657894736842096
2011	2.98157894736842
2012	2.9307692307692306
2013	2.925641025641027
2014	2.9605263157894743
2015	2.9631578947368427
2016	2.9684210526315797
2017	2.9282051282051285
2018	2.9499999999999997
2019	2.923076923076924
2020	2.9128205128205136
2021	2.905128205128205
2022	2.8923076923076922
2023	2.8820512820512816