Year	Number
1996	60.3260879516602
1998	61.4130439758301
2000	63.5869560241699
2002	67.5675659179688
2003	65.9459457397461
2004	64.6766204833984
2005	62.7450981140137
2006	58.3333320617676
2007	60.1941757202148
2008	61.1650466918945
2009	62.2009582519531
2010	59.8086128234863
2011	59.7156410217285
2012	63.5071105957031
2013	62.0853080749512
2014	65.3846130371094
2015	60.9523811340332
2016	65.7142868041992
2017	63.8095245361328
2018	62.8571434020996
2019	60.9523811340332
2020	57.6190490722656
2021	60
2022	60.8490562438965