Year	1=low to 6=high
2005	3.4437499999999996
2006	3.3882352941176466
2007	3.376470588235294
2008	3.370588235294118
2009	3.388235294117646
2010	3.4235294117647057
2011	3.3263157894736843
2012	3.3
2013	3.3
2014	3.2800000000000002
2015	3.2650000000000006
2016	3.2550000000000003
2017	3.245
2018	3.2600000000000007
2019	3.285000000000001
2020	3.342857142857143
2021	3.3523809523809525
2022	3.3619047619047615
2023	3.380952380952381