Year	Number
1996	80.1075286865234
1998	80.748664855957
2000	81.3829803466797
2002	80.4232788085938
2003	79.3650817871094
2004	74.8768463134766
2005	74.634147644043
2006	73.6585388183594
2007	74.271842956543
2008	74.271842956543
2009	74.6411514282227
2010	74.2857131958008
2011	73.459716796875
2012	73.459716796875
2013	73.9336471557617
2014	74.038459777832
2015	70.9523773193359
2016	70.9523773193359
2017	71.9047622680664
2018	69.523811340332
2019	67.6190490722656
2020	69.523811340332
2021	68.5714263916016
2022	69.3396224975586