Year	1=low to 6=high
2005	3.0789473684210527
2006	3.026315789473684
2007	3.026315789473684
2008	3
2009	3.05
2010	3.15
2011	3.175
2012	3.15
2013	3.125
2014	3.1
2015	3.1
2016	3.1
2017	3.1
2018	3.1
2019	3.2
2020	3.2
2021	3.2
2022	3.2
2023	3.2