Year	Number
1996	64.4808731079102
1998	71.5847015380859
2000	63.3879776000977
2002	60.5405387878418
2003	61.6216201782227
2004	67.164176940918
2005	57.3529396057129
2006	68.7804870605469
2007	72.8155364990234
2008	72.8155364990234
2009	71.291862487793
2010	71.7703323364258
2011	71.0900497436523
2012	63.9810409545898
2013	65.8767776489258
2014	71.6346130371094
2015	71.9047622680664
2016	75.7142868041992
2017	78.5714263916016
2018	78.5714263916016
2019	79.523811340332
2020	80.9523773193359
2021	76.6666641235352
2022	80.6603775024414