Year	Number
2004	9175
2005	9862
2006	11349
2007	13547
2008	11630
2009	10748
2010	13206
2011	13087
2012	12552
2013	13302
2014	13480
2015	13746
2016	14486
2017	13614
2018	14404
2019	14749
2020	14057
2021	17325