Year	1=low to 6=high
2005	3.62
2006	3.6
2007	3.7375
2008	3.7874999999999996
2009	3.7333333333333334
2010	3.755555555555556
2011	3.7375000000000003
2012	3.75
2013	3.7249999999999996
2014	3.5800000000000005
2015	3.6
2016	3.6
2017	3.6
2018	3.62
2019	3.6599999999999993
2020	3.65
2021	3.625
2022	3.65
2023	3.6750000000000003