Year	Number
1996	9.8360652923584
1998	21.8579235076904
2000	21.3114757537842
2002	16.7567558288574
2003	25.9459457397461
2004	19.9004974365234
2005	13.235294342041
2006	7.31707334518433
2007	8.25242710113525
2008	10.1941747665405
2009	14.8325357437134
2010	11.9617223739624
2011	11.8483409881592
2012	9.00473976135254
2013	11.3744077682495
2014	10.5769233703613
2015	11.4285717010498
2016	12.8571424484253
2017	13.3333330154419
2018	14.2857141494751
2019	18.0952377319336
2020	16.6666660308838
2021	14.7619047164917
2022	15.5660381317139