Year	Number
1996	10.638298034668
1998	12.2340421676636
2000	21.1640205383301
2002	21.6931209564209
2003	25.1256275177002
2004	20.8737869262695
2005	27.6699028015137
2006	27.0531406402588
2007	19.8067626953125
2008	18.75
2009	15.6398105621338
2010	18.9573459625244
2011	18.4834117889404
2012	12.7962083816528
2013	10.9004735946655
2014	11.9047622680664
2015	9.0476188659668
2016	4.7619047164917
2017	7.14285707473755
2018	10.3773584365845
2019	9.90566062927246
2020	12.7358493804932
2021	11.7924528121948
2022	13.6792449951172