Year	Number
1996	12.9032258987427
1998	16.0427799224854
2000	12.7659578323364
2002	32.8042335510254
2003	34.3915328979492
2004	24.630542755127
2005	19.0243911743164
2006	16.5853652954102
2007	19.4174766540527
2008	14.0776700973511
2009	20.5741634368896
2010	16.6666660308838
2011	18.9573459625244
2012	12.7962083816528
2013	11.8483409881592
2014	8.65384578704834
2015	10.4761905670166
2016	13.3333330154419
2017	13.8095235824585
2018	12.8571424484253
2019	11.9047622680664
2020	14.2857141494751
2021	13.8095235824585
2022	15.5660381317139