Year	1=low to 6=high
2005	2.8421052631578947
2006	2.825
2007	2.8375
2008	2.8125
2009	2.841463414634146
2010	2.841463414634146
2011	2.792682926829268
2012	2.744186046511628
2013	2.7386363636363638
2014	2.813953488372093
2015	2.7209302325581395
2016	2.7325581395348837
2017	2.6818181818181817
2018	2.7093023255813953
2019	2.659090909090909
2020	2.647727272727273
2021	2.6511627906976742
2022	2.6363636363636362
2023	2.6136363636363638