Year	Number
1996	9.04255294799805
1998	23.9361705780029
2000	21.6931209564209
2002	17.4603176116943
2003	19.0954780578613
2004	17.4757289886475
2005	10.6796112060547
2006	12.0772943496704
2007	13.043478012085
2008	15.865385055542
2009	12.7962083816528
2010	12.3222751617432
2011	13.2701425552368
2012	17.5355453491211
2013	18.0094795227051
2014	23.3333339691162
2015	21.4285717010498
2016	16.6666660308838
2017	13.3333330154419
2018	13.2075471878052
2019	12.7358493804932
2020	14.1509437561035
2021	17.4528293609619
2022	14.1509437561035