Year	number
2005	37.8974358974359
2006	37.5
2007	37.575
2008	37.475
2009	37.225
2010	37.65
2011	37.35
2012	37.26190476190476
2013	37.30232558139535
2014	37.83720930232558
2015	37.76744186046512
2016	37.30232558139535
2017	36.372093023255815
2018	36.46511627906977
2019	36.48837209302326