Year	1=low to 6=high
2005	2.7972972972972974
2006	2.77027027027027
2007	2.77027027027027
2008	2.7432432432432434
2009	2.723684210526316
2010	2.710526315789474
2011	2.776315789473684
2012	2.7051282051282053
2013	2.7051282051282053
2014	2.736842105263158
2015	2.710526315789474
2016	2.6842105263157894
2017	2.6538461538461537
2018	2.710526315789474
2019	2.717948717948718
2020	2.717948717948718
2021	2.6923076923076925
2022	2.730769230769231
2023	2.6666666666666665