Year	1=low to 6=high
2005	3.3043478260869565
2006	3.48
2007	3.42
2008	3.46
2009	3.5961538461538463
2010	3.5961538461538463
2011	3.5357142857142856
2012	3.4833333333333334
2013	3.5
2014	3.5161290322580645
2015	3.4838709677419355
2016	3.5
2017	3.453125
2018	3.4838709677419355
2019	3.390625
2020	3.40625
2021	3.403225806451613
2022	3.375
2023	3.375