Year	Number
1996	8.51063823699951
1998	11.1702127456665
2000	10.582010269165
2002	5.29100513458252
2003	9.54773902893066
2004	6.7961163520813
2005	6.31067943572998
2006	8.21256065368652
2007	16.425121307373
2008	19.7115383148193
2009	22.274881362915
2010	25.5924167633057
2011	19.4312801361084
2012	15.6398105621338
2013	20.3791465759277
2014	16.6666660308838
2015	12.380952835083
2016	10.9523811340332
2017	11.9047622680664
2018	12.7358493804932
2019	12.7358493804932
2020	11.3207550048828
2021	11.3207550048828
2022	10.8490562438965