Year	Number
1996	68.5
1998	72.1393051147461
2000	65.6716384887695
2002	65.6716384887695
2003	66.1691513061523
2004	67.3076934814453
2005	66.8269195556641
2006	66.8269195556641
2007	64.9038467407227
2008	63.461540222168
2009	63.9810409545898
2010	63.9810409545898
2011	63.8497657775879
2012	63.8497657775879
2013	63.3802833557129
2014	62.5615768432617
2015	63.0541877746582
2016	66.0098495483398
2017	66.0098495483398
2018	66.5048522949219
2019	65.7004852294922
2020	67.1497573852539
2021	67.1497573852539
2022	67.1497573852539