Year	1=low to 6=high
2005	3.223684210526316
2006	3.1875
2007	3.2125
2008	3.1875
2009	3.1951219512195124
2010	3.2195121951219514
2011	3.182926829268293
2012	3.13953488372093
2013	3.1363636363636362
2014	3.13953488372093
2015	3.116279069767442
2016	3.0697674418604652
2017	3.022727272727273
2018	3.058139534883721
2019	3.0568181818181817
2020	3.102272727272727
2021	3.104651162790698
2022	3.090909090909091
2023	3.102272727272727