Year	Number
2004	2633
2005	4091
2006	4973
2007	6529
2008	7054
2009	5340
2010	5989
2011	7350
2012	8596
2013	8893
2014	10866
2015	11307
2016	9823
2017	11105
2018	14028
2019	12884
2020	11148
2021	12239