Year	1=low to 6=high
2005	3.3026315789473686
2006	3.2875
2007	3.3
2008	3.35
2009	3.341463414634146
2010	3.3536585365853657
2011	3.341463414634146
2012	3.244186046511628
2013	3.1818181818181817
2014	3.116279069767442
2015	3.046511627906977
2016	3.011627906976744
2017	2.977272727272727
2018	2.953488372093023
2019	2.9545454545454546
2020	2.9318181818181817
2021	2.895348837209302
2022	2.840909090909091
2023	2.8181818181818183