Year	Number
1996	59.1397857666016
1998	59.8930473327637
2000	59.5744667053223
2002	60.3174591064453
2003	61.375659942627
2004	59.6059112548828
2005	62.926830291748
2006	59.5121955871582
2007	61.1650466918945
2008	63.1067962646484
2009	65.0717697143555
2010	63.3333320617676
2011	63.5071105957031
2012	61.1374397277832
2013	62.0853080749512
2014	60.0961532592773
2015	60.9523811340332
2016	61.4285697937012
2017	62.3809509277344
2018	59.523811340332
2019	59.0476188659668
2020	59.523811340332
2021	59.0476188659668
2022	58.9622650146484