Year	Number
1996	20.1086959838867
1998	19.0217399597168
2000	23.3695659637451
2002	32.972972869873
2003	36.2162170410156
2004	36.8159217834473
2005	43.6274528503418
2006	33.3333320617676
2007	31.5533981323242
2008	29.1262130737305
2009	18.1818180084229
2010	13.8755979537964
2011	9.47867298126221
2012	9.00473976135254
2013	12.3222751617432
2014	8.17307662963867
2015	7.61904764175415
2016	9.5238094329834
2017	9.0476188659668
2018	8.09523773193359
2019	7.14285707473755
2020	8.5714282989502
2021	10
2022	14.1509437561035