Year	1=low to 6=high
2005	2.945945945945946
2006	2.9864864864864864
2007	3.027027027027027
2008	2.945945945945946
2009	2.973684210526316
2010	2.960526315789474
2011	2.960526315789474
2012	2.923076923076923
2013	2.923076923076923
2014	2.9210526315789473
2015	2.8947368421052633
2016	2.789473684210526
2017	2.769230769230769
2018	2.776315789473684
2019	2.717948717948718
2020	2.6923076923076925
2021	2.6666666666666665
2022	2.7051282051282053
2023	2.7435897435897436