Year	1=low to 6=high
2005	3.111111111111111
2006	3.0945945945945947
2007	3.1621621621621623
2008	3.2162162162162162
2009	3.210526315789474
2010	3.236842105263158
2011	3.289473684210526
2012	3.3421052631578947
2013	3.3421052631578947
2014	3.3947368421052633
2015	3.3684210526315788
2016	3.27027027027027
2017	3.1710526315789473
2018	3.135135135135135
2019	3.1184210526315788
2020	3.1315789473684212
2021	3.108108108108108
2022	3.0921052631578947
2023	3.0657894736842106