Year	Number
1996	57.7889442443848
1998	58.5
2000	57.2139320373535
2002	57.7114410400391
2003	62.6865653991699
2004	60.5769233703613
2005	60.2870826721191
2006	58.8516731262207
2007	57.8947372436523
2008	58.6538467407227
2009	60.6635055541992
2010	61.6113739013672
2011	61.5023460388184
2012	60.0938949584961
2013	59.6244125366211
2014	62.5
2015	57.6190490722656
2016	51.9047622680664
2017	52.3809509277344
2018	50.476188659668
2019	50.476188659668
2020	47.1428565979004
2021	46.6666679382324
2022	45.2830200195313