Year	1=low to 6=high
2005	3.8888888888888884
2006	3.880000000000001
2007	3.8472222222222228
2008	3.75
2009	3.6794871794871797
2010	3.6410256410256405
2011	3.538461538461539
2012	3.4166666666666665
2013	3.3809523809523805
2014	3.075757272727273
2015	3.106060606060605
2016	3.060606363636363
2017	3.121212121212122
2018	3.166666666666667
2019	3.3333333636363633
2020	3.250000000000001
2021	3.2833333000000002
2022	3.2666667000000005
2023	3.2666667000000005