Year	1=low to 6=high
2005	3.1
2006	3.1
2007	3.2
2008	3.3
2009	3.3
2010	3.3
2011	3.357142857142857
2012	3.4375
2013	3.4375
2014	3.4375
2015	3.4375
2016	3.4375
2017	3.4375
2018	3.4375
2019	3.4375
2020	3.4444444444444446
2021	3.5555555555555554
2022	3.5555555555555554
2023	3.5555555555555554