Year	Number
1996	5.91397857666016
1998	4.8128342628479
2000	5.31914901733398
2002	6.87830686569214
2003	8.46560859680176
2004	7.38916254043579
2005	12.1951217651367
2006	16.0975608825684
2007	15.0485439300537
2008	9.22330093383789
2009	6.69856452941895
2010	4.7619047164917
2011	7.10900497436523
2012	6.63507127761841
2013	7.10900497436523
2014	12.0192308425903
2015	11.9047622680664
2016	11.9047622680664
2017	8.09523773193359
2018	6.66666650772095
2019	9.0476188659668
2020	8.09523773193359
2021	6.66666650772095
2022	6.13207530975342