Year	Number
1996	6.01092910766602
1998	5.46448087692261
2000	4.37158489227295
2002	7.02702713012695
2003	5.40540552139282
2004	12.93532371521
2005	16.6666660308838
2006	13.6585369110107
2007	15.5339803695679
2008	20.8737869262695
2009	20.5741634368896
2010	21.0526313781738
2011	20.8530807495117
2012	19.4312801361084
2013	18.0094795227051
2014	17.3076915740967
2015	16.6666660308838
2016	17.619047164917
2017	17.619047164917
2018	16.6666660308838
2019	13.3333330154419
2020	13.3333330154419
2021	12.380952835083
2022	11.3207550048828