Year	number
2005	43.08108108108108
2006	42.526315789473685
2007	42.5
2008	42.421052631578945
2009	42.36842105263158
2010	42.421052631578945
2011	41.44736842105263
2012	41.28947368421053
2013	41.05263157894737
2014	41.63157894736842
2015	41.5
2016	40.973684210526315
2017	39.89473684210526
2018	39.86842105263158
2019	38.8421052631579