Year	Number
1996	62.3115577697754
1998	62
2000	62.1890563964844
2002	61.6915435791016
2003	58.2089538574219
2004	57.211540222168
2005	55.5023918151855
2006	53.5885162353516
2007	53.5885162353516
2008	57.6923065185547
2009	58.2938385009766
2010	54.9763031005859
2011	61.5023460388184
2012	61.0328636169434
2013	62.4413146972656
2014	66.3461532592773
2015	64.2857131958008
2016	69.523811340332
2017	68.0952377319336
2018	69.0476226806641
2019	70.476188659668
2020	72.3809509277344
2021	68.5714263916016
2022	68.3962249755859