Year	Number
1996	21.1956520080566
1998	22.2826080322266
2000	19.0217399597168
2002	18.9189186096191
2003	14.5945949554443
2004	18.9054718017578
2005	12.2549018859863
2006	19.1176471710205
2007	16.5048542022705
2008	11.1650485992432
2009	15.7894735336304
2010	13.8755979537964
2011	14.6919431686401
2012	10.9004735946655
2013	10.9004735946655
2014	10.0961542129517
2015	9.5238094329834
2016	10
2017	8.09523773193359
2018	7.61904764175415
2019	6.66666650772095
2020	9.5238094329834
2021	9.5238094329834
2022	8.49056625366211