Year	1=low to 6=high
2005	3.40625
2006	3.3529411764705883
2007	3.3529411764705883
2008	3.3529411764705883
2009	3.264705882352941
2010	3.235294117647059
2011	3.210526315789474
2012	3.1
2013	3
2014	3
2015	2.95
2016	2.975
2017	2.975
2018	2.975
2019	2.975
2020	2.9523809523809526
2021	2.9285714285714284
2022	2.9285714285714284
2023	2.9761904761904763