Year	Number
2006	1361
2007	2354
2008	3488
2009	4576
2010	5391
2011	6852
2012	31077
2013	37988
2014	24835
2015	23694
2016	26385
2017	25062
2018	27211
2019	30000
2020	32000
2021	30933
2022	32718