Year	Number
1996	32.5
1998	30.8457717895508
2000	20.8955230712891
2002	18.4079608917236
2003	15.4228858947754
2004	14.9038457870483
2005	10.0961542129517
2006	11.057692527771
2007	13.4615383148193
2008	14.9038457870483
2009	16.5876770019531
2010	17.5355453491211
2011	17.8403759002686
2012	25.3521118164063
2013	26.2910804748535
2014	31.0344829559326
2015	33.0049247741699
2016	35.9605903625488
2017	36.9458122253418
2018	37.3786392211914
2019	36.7149772644043
2020	33.3333320617676
2021	33.8164253234863
2022	34.7826080322266