Year	Number
1996	14.5728645324707
1998	11.5
2000	14.9253730773926
2002	16.9154224395752
2003	16.9154224395752
2004	17.7884616851807
2005	22.4880390167236
2006	23.9234447479248
2007	22.0095691680908
2008	21.634614944458
2009	23.222749710083
2010	28.9099521636963
2011	25.3521118164063
2012	23.9436626434326
2013	15.023473739624
2014	12.9807691574097
2015	11.9047622680664
2016	8.09523773193359
2017	8.5714282989502
2018	7.14285707473755
2019	7.61904764175415
2020	8.09523773193359
2021	8.09523773193359
2022	9.90566062927246