Year	1=low to 6=high
2005	3.291666666666666
2006	3.2837837837837833
2007	3.297297297297297
2008	3.27027027027027
2009	3.258771929824561
2010	3.223684210526316
2011	3.2236842105263164
2012	3.2192982456140355
2013	3.232456140350878
2014	3.2368426315789467
2015	3.223684736842105
2016	3.18918936936937
2017	3.1403508771929824
2018	3.162162162162162
2019	3.1008772105263156
2020	3.0964912280701746
2021	3.1171171081081086
2022	3.11842102631579
2023	3.118421052631579