Year	Number
1996	60.6557388305664
1998	65.0273208618164
2000	66.1202163696289
2002	58.9189186096191
2003	59.4594612121582
2004	59.2039794921875
2005	51.9607849121094
2006	56.5853652954102
2007	53.8834953308105
2008	56.7961158752441
2009	57.4162673950195
2010	59.3301429748535
2011	59.7156410217285
2012	60.6635055541992
2013	61.1374397277832
2014	59.6153831481934
2015	60.9523811340332
2016	58.0952377319336
2017	54.2857131958008
2018	50.9523811340332
2019	56.6666679382324
2020	60.476188659668
2021	57.6190490722656
2022	61.3207550048828