Year	1=low to 6=high
2005	2.789473684210526
2006	2.789473684210526
2007	2.8157894736842106
2008	2.789473684210526
2009	2.825
2010	2.85
2011	2.925
2012	2.825
2013	2.875
2014	2.9
2015	2.9
2016	2.85
2017	2.875
2018	2.9
2019	2.925
2020	2.925
2021	2.9
2022	2.95
2023	2.925