Year	1=low to 6=high
2005	3.2945205479452064
2006	3.2600000000000007
2007	3.2808219178082196
2008	3.291891891891892
2009	3.2973684210526324
2010	3.3315789473684214
2011	3.328571428571428
2012	3.315189873417722
2013	3.3
2014	3.2880000000000003
2015	3.2840000000000007
2016	3.2527777777777778
2017	3.2328767123287663
2018	3.262499999999999
2019	3.267567567567567
2020	3.2777777777777772
2021	3.2845070422535207
2022	3.2931506849315073
2023	3.298630136986301