Year	1=low to 6=high
2005	3.6507936507936507
2006	3.6384615384615384
2007	3.6538461538461537
2008	3.5846153846153848
2009	3.626865671641791
2010	3.6343283582089554
2011	3.6159420289855073
2012	3.591549295774648
2013	3.5416666666666665
2014	3.5277777777777777
2015	3.4722222222222223
2016	3.415492957746479
2017	3.388888888888889
2018	3.408450704225352
2019	3.4657534246575343
2020	3.4452054794520546
2021	3.4444444444444446
2022	3.3513513513513513
2023	3.364864864864865