Year	Number
1996	1
1998	8.95522403717041
2000	24.3781089782715
2002	22.3880596160889
2003	22.8855724334717
2004	18.75
2005	15.865385055542
2006	25.480770111084
2007	21.1538467407227
2008	21.634614944458
2009	17.5355453491211
2010	19.9052124023438
2011	23.474178314209
2012	23.9436626434326
2013	24.4131450653076
2014	25.6157627105713
2015	28.5714282989502
2016	32.019702911377
2017	32.019702911377
2018	29.6116504669189
2019	28.9855079650879
2020	26.0869560241699
2021	25.1207733154297
2022	27.0531406402588