Year	1=low to 6=high
2005	3.2375
2006	3.1341463414634148
2007	3.1951219512195124
2008	3.182926829268293
2009	3.158536585365854
2010	3.1463414634146343
2011	3.130952380952381
2012	3.107142857142857
2013	3.104651162790698
2014	3.1219512195121952
2015	3.0853658536585367
2016	3.0657894736842106
2017	3.0526315789473686
2018	3
2019	3.051282051282051
2020	3.039473684210526
2021	3.0657894736842106
2022	3.08974358974359
2023	3.1153846153846154