Year	Number
1996	63.5
1998	59.7014923095703
2000	65.1741256713867
2002	67.164176940918
2003	64.6766204833984
2004	62.5
2005	59.1346168518066
2006	55.288459777832
2007	47.1153831481934
2008	46.6346168518066
2009	45.0236968994141
2010	44.0758285522461
2011	46.948356628418
2012	55.3990592956543
2013	56.3380279541016
2014	63.0541877746582
2015	63.0541877746582
2016	66.0098495483398
2017	63.5467987060547
2018	59.7087364196777
2019	59.9033813476563
2020	59.4202880859375
2021	58.4541053771973
2022	58.4541053771973