Year	1=low to 6=high
2005	3.15
2006	3.12
2007	3.1624999999999996
2008	3.225
2009	3.233333333333333
2010	3.2444444444444445
2011	3.2874999999999996
2012	3.3625
2013	3.3749999999999996
2014	3.2199999999999998
2015	3.2
2016	3.1799999999999997
2017	3.2
2018	3.2
2019	3.2
2020	3.175
2021	3.3000000000000003
2022	3.275
2023	3.325