Year	Number
1996	63.8190956115723
1998	60.5
2000	57.7114410400391
2002	62.6865653991699
2003	63.6815910339355
2004	62.980770111084
2005	61.7224884033203
2006	63.6363639831543
2007	60.7655487060547
2008	58.6538467407227
2009	62.0853080749512
2010	62.5592422485352
2011	62.9107971191406
2012	63.3802833557129
2013	61.9718322753906
2014	71.1538467407227
2015	66.1904754638672
2016	64.2857131958008
2017	63.8095245361328
2018	69.523811340332
2019	67.6190490722656
2020	68.5714263916016
2021	68.5714263916016
2022	68.3962249755859