Year	Number
2004	39614
2005	40676
2006	44007
2007	51994
2008	52425
2009	43796
2010	40769
2011	38878
2012	41448
2013	42029
2014	43145
2015	44604
2016	48180
2017	49264
2018	55999
2019	55577
2020	50627
2021	60825