Year	number
2006	3234
2007	3699
2008	2598
2009	2651
2010	1639
2011	1715
2012	1781
2013	1963
2014	2063
2015	2385
2016	2683
2017	2588
2018	2312
2019	2214
2020	2501
2021	3231
2022	3052