Year	Number
1996	46.7336692810059
1998	46.5
2000	51.7412948608398
2002	54.2288551330566
2003	53.7313423156738
2004	58.1730766296387
2005	57.8947372436523
2006	58.8516731262207
2007	57.4162673950195
2008	58.6538467407227
2009	60.6635055541992
2010	62.0853080749512
2011	62.4413146972656
2012	61.0328636169434
2013	59.6244125366211
2014	65.3846130371094
2015	61.9047622680664
2016	61.4285697937012
2017	60
2018	59.523811340332
2019	60
2020	64.2857131958008
2021	65.7142868041992
2022	61.3207550048828