Year	1=low to 6=high
2005	3.1399999999999997
2006	3.0799999999999996
2007	3.12
2008	3.2399999999999998
2009	3.3200000000000003
2010	3.4
2011	3.257142857142857
2012	3.2375000000000003
2013	3.2375
2014	3.2375
2015	3.2375
2016	3.2375
2017	3.2375
2018	3.2249999999999996
2019	3.225
2020	3.188888888888889
2021	3.2222222222222228
2022	3.1888888888888887
2023	3.2000000000000006