Year	Number
1996	2.68817210197449
1998	0
2000	0
2002	0
2003	5.29100513458252
2004	8.86699485778809
2005	14.1463413238525
2006	10.2439022064209
2007	13.5922327041626
2008	15.5339803695679
2009	20.0956935882568
2010	18.0952377319336
2011	18.9573459625244
2012	18.9573459625244
2013	21.3270149230957
2014	15.865385055542
2015	18.0952377319336
2016	16.1904754638672
2017	16.6666660308838
2018	22.8571434020996
2019	23.8095245361328
2020	19.5238094329834
2021	21.9047622680664
2022	21.698112487793