Year	Number
2004	22554
2005	25626
2006	29843
2008	34245
2009	26049
2010	27641
2011	30439
2012	31694
2013	32592
2014	26076
2015	22404
2016	23640
2017	24506
2018	25307
2019	25119
2020	24153
2021	26987