Year	1=low to 6=high
2005	2.923076923076923
2006	2.9615384615384617
2007	3.05
2008	3
2009	3
2010	3.05
2011	3.2222222222222223
2012	3.2777777777777777
2013	3.2777777777777777
2014	3.25
2015	3
2016	3
2017	3
2018	2.75
2019	2.75