Year	1=low to 6=high
2005	3.0793650793650795
2006	3.046875
2007	3.0384615384615383
2008	3.0692307692307694
2009	3.0597014925373136
2010	3.074626865671642
2011	3.0217391304347827
2012	2.9788732394366195
2013	2.9444444444444446
2014	2.9444444444444446
2015	2.9444444444444446
2016	2.9577464788732395
2017	2.9375
2018	2.9507042253521125
2019	2.9315068493150687
2020	2.9726027397260273
2021	3.013888888888889
2022	3.0135135135135136
2023	3.0405405405405403