Year	1=low to 6=high
2005	2.8684210526315788
2006	2.8947368421052633
2007	2.9210526315789473
2008	2.8947368421052633
2009	2.9
2010	2.9
2011	2.975
2012	2.925
2013	2.875
2014	2.9
2015	2.9
2016	2.95
2017	2.925
2018	2.9
2019	2.925
2020	2.9
2021	2.925
2022	2.95
2023	2.975