Year	Number
2005	11199
2006	9384
2007	10287
2008	11095
2009	13047
2010	14716
2011	18540
2012	17389
2013	18015
2014	17841
2015	17263
2016	17551
2017	21845
2018	18219
2019	15728
2020	12071
2021	12010