Year	1=low to 6=high
2005	4.230769230769231
2006	4.384615384615385
2007	4.25
2008	4.1
2009	4.05
2010	3.95
2011	3.8333333333333335
2012	3.9444444444444446
2013	3.9444444444444446
2014	3.75
2015	3.625
2016	3.75
2017	4
2018	4
2019	4