Year	number
2006	6627
2007	6963
2008	8225
2009	10955
2010	11693
2011	12353
2012	16194
2013	15092
2014	18621
2015	23512
2016	26613
2017	7142
2018	7487
2019	8468
2020	11676
2021	13710
2022	14552