Year	Number
2004	27154
2005	22725
2006	23638
2007	22941
2008	20439
2010	16116
2011	16266
2012	15058
2013	16549
2014	16616
2015	17910
2016	27304
2017	43986
2018	58968
2019	77930
2020	92836
2021	227170