Year	Number
1996	9.54773902893066
1998	16
2000	26.3681583404541
2002	12.93532371521
2003	16.9154224395752
2004	17.3076915740967
2005	11.4832534790039
2006	8.61244010925293
2007	7.65550231933594
2008	8.65384578704834
2009	6.63507127761841
2010	7.5829381942749
2011	10.3286380767822
2012	9.38967132568359
2013	8.92018795013428
2014	6.73076915740967
2015	8.5714282989502
2016	16.6666660308838
2017	15.7142858505249
2018	16.6666660308838
2019	14.7619047164917
2020	11.9047622680664
2021	9.5238094329834
2022	8.96226406097412