Year	1=low to 6=high
2005	3.3846153846153846
2006	3.3846153846153846
2007	3.35
2008	3.45
2009	3.4
2010	3.3
2011	3.388888888888889
2012	3.3333333333333335
2013	3.2222222222222223
2014	2.875
2015	2.75
2016	2.5
2017	2.5
2018	2.5
2019	2.25