Year	number
2006	12275
2007	14235
2008	11860
2009	7859
2010	8153
2011	9059
2012	8965
2013	9429
2014	11005
2015	11860
2016	11174
2017	13046
2018	16326
2019	12817
2020	11731
2021	16748
2022	11796