Year	1=low to 6=high
2005	2.981081081081081
2006	2.9702702702702704
2007	2.9702702702702704
2008	2.948648648648649
2009	2.9631578947368418
2010	2.9657894736842105
2011	2.9815789473684204
2012	2.9307692307692306
2013	2.925641025641027
2014	2.960526315789473
2015	2.9631578947368418
2016	2.9684210526315793
2017	2.9282051282051285
2018	2.95
2019	2.9230769230769242
2020	2.9128205128205136
2021	2.9051282051282055
2022	2.8923076923076922
2023	2.882051282051282