Year	1=low to 6=high
2005	3.4444444444444446
2006	3.3378378378378377
2007	3.364864864864865
2008	3.3783783783783785
2009	3.3947368421052633
2010	3.3684210526315788
2011	3.3947368421052633
2012	3.4078947368421053
2013	3.3815789473684212
2014	3.3684210526315788
2015	3.4078947368421053
2016	3.391891891891892
2017	3.3552631578947367
2018	3.3378378378378377
2019	3.25
2020	3.236842105263158
2021	3.22972972972973
2022	3.1842105263157894
2023	3.1973684210526314