Year	Number
1996	13.8297872543335
1998	15.957447052002
2000	26.4550266265869
2002	26.9841270446777
2003	22.1105518341064
2004	21.3592224121094
2005	22.8155345916748
2006	25.1207733154297
2007	27.0531406402588
2008	24.0384616851807
2009	21.8009471893311
2010	18.9573459625244
2011	25.5924167633057
2012	23.222749710083
2013	25.1184825897217
2014	30.4761905670166
2015	30.9523811340332
2016	30
2017	30
2018	10.3773584365845
2019	9.90566062927246
2020	15.0943393707275
2021	17.9245281219482
2022	19.3396224975586