Year	Number
1996	0
1998	0.531914889812469
2000	0
2002	0
2003	0
2004	4.36893224716187
2005	3.88349509239197
2006	5.31400966644287
2007	7.72946882247925
2008	8.17307662963867
2009	9.00473976135254
2010	18.9573459625244
2011	19.9052124023438
2012	20.3791465759277
2013	19.4312801361084
2014	14.2857141494751
2015	10.9523811340332
2016	19.5238094329834
2017	22.8571434020996
2018	26.4150943756104
2019	21.698112487793
2020	22.6415100097656
2021	23.5849056243896
2022	22.1698112487793