Year	number
2006	13338
2007	14248
2008	13184
2009	14780
2010	18669
2011	20070
2012	25313
2013	30371
2014	30709
2015	40805
2016	44141
2017	39416
2018	37281
2019	40617
2020	42135
2021	53979
2022	53717